The Geographic Availability of the Chilazon

(13) Zebulun shall dwell by the seashore;
He shall be a haven for ships,
And his flank shall rest on Sidon.

(18) And of Zebulun he said:
Rejoice, O Zebulun, on your journeys,
And Issachar, in your tents.
(19) They invite their kin to the mountain,
Where they offer sacrifices of success.
For they draw from the riches of the sea
And the hidden hoards of the sand.

The verse should be interpreted as follows: Zebulun said before the Holy One, Blessed be He: Master of the Universe! To my brothers, the tribes whose territory is adjacent to mine, You gave fields and vineyards, whereas to me You gave mountains and hills; to my brothers You gave lands, whereas to me You gave seas and rivers. God said back to him: Nevertheless, all will need you due to the ḥilazon, the small sea creature residing in your territory that is the source of the dye used in the ritual fringes [tzitzit]. As it is stated in Moses’ blessing to Zebulun: “They shall call the people to the mountain: There they shall sacrifice offerings of righteousness; for they shall suck of the abundance of the seas, and of the hidden treasures of the sand” (Deuteronomy 33:19). Rav Yosef teaches about this: “Treasures”; this is referring to the ḥilazon, which is found in the waters of Zebulun. “Hidden”; this is referring to the tarit, a type of sardine, which is also found in Zebulun’s coastal waters. “Sand”; this is referring to the sand from which white glass is made. Zebulun said to Him: All of these resources are indeed found in my territory, but Master of the Universe, who will inform me if others take them without permission? He said to the tribe of Zebulun: “There they shall sacrifice offerings of righteousness.” This shall be a sign for you that anyone who takes these items from you without making payment will not prosper at all in his business.

Since balsam oil was discussed, the Gemara cites the verse: “But Nebuzaradan the captain of the guard left of the poorest of the land to be vinedressers and husbandmen” (Jeremiah 52:16). The Gemara explains the verse: With regard to vinedressers, Rav Yosef taught: These poorest of the land were the balsam collectors in the south of Eretz Yisrael, in the expanse from Ein Gedi to Ramata. And the husbandmen; these are the trappers of the snail [ḥilazon], from which the sky blue dye is produced in the north of the country, in the area between the Promontory of Tyre and Ḥaifa. Only a small number of poor people could barely eke out a living from these tasks, which involved mere gathering.

(23) And everyone who possessed blue, purple, and crimson yarns, fine linen, goats’ hair, tanned ram skins, and dolphin skins, brought them; (24) everyone who would make gifts of silver or copper brought them as gifts for ה'; and everyone who possessed acacia wood for any work of the service brought that.

Another matter: “They shall take Me a gift” – when the Holy One blessed be He told Moses about the matters pertaining to the Tabernacle, he said before Him: ‘Master of the universe, is Israel capable of crafting it?’ The Holy One blessed be He said to him: ‘Even one member of Israel is capable of crafting it,’ as it is stated: “From each man whose heart moves him” (Exodus 25:2). The Rabbis said: Jewels and pearls would fall amidst the manna that was falling for Israel, and the prominent among them would come, gather them, and store them. Know that it is so, as it is stated: “They brought him more gifts morning after morning” (Exodus 36:3). Did they bring in the morning, but in the afternoon they did not bring? It is rather that they brought from what the manna would bring down for them. Likewise, it says: “The princes [nesiim] brought [the onyx stones and the stones for setting]” (Exodus 35:27).
“This is the gift that you shall collect from them: gold, silver, and bronze” (Exodus 25:3)
“This is the gift” (Exodus 25:3) – Rabbi Tavyomei said: When the time arrived for Jacob our patriarch to depart from the world, he called his sons and said to them: ‘Know that the Holy One blessed be He is destined to say to your descendants to craft a Tabernacle; however, all its needs must be ready in their possession,’ as it is stated: “And God will be with you” (Genesis 48:21). Does it enter your mind that when Jacob our patriarch was alive the Holy One blessed be He was not with his sons? Rather, so he said to them: ‘He is destined to say to you: “They shall craft a Sanctuary for Me” (Exodus 25:8), and He will descend and rest His presence in your midst, as it is stated: “They shall craft a Sanctuary for Me, and I will dwell among them” (Exodus 25:8).’ Some prepared items for themselves and some forgot. When Moses came and they crafted the Tabernacle, some brought from their own, and some brought only from what was already in their possession, as it says: “And every man with whom was found sky-blue, purple, [and scarlet wool” (Exodus 35:23), and it says: “And every man with whom acacia wood was found” (Exodus 35:24).

Now Moses, tending the flock of his father-in-law Jethro, the priest of Midian, drove the flock into the wilderness, and came to Horeb, the mountain of God.

Now when Pharaoh let the people go, God did not lead them by way of the land of the Philistines, although it was nearer; for God said, “The people may have a change of heart when they see war, and return to Egypt.”

They set out from Pene -hahiroth and passed through the sea into the wilderness; and they made a three-days’ journey in the wilderness of Etham and encamped at Marah. They set out from Marah and came to Elim. There were twelve springs in Elim and seventy palm trees, so they encamped there. They set out from Elim and encamped by the Sea of Reeds.

MISHNA: This fundamental mishna enumerates those who perform the primary categories of labor prohibited on Shabbat, which number forty-less-one. They are grouped in accordance with their function: One who sows, and one who plows, and one who reaps, and one who gathers sheaves into a pile, and one who threshes, removing the kernel from the husk, and one who winnows threshed grain in the wind, and one who selects the inedible waste from the edible, and one who grinds, and one who sifts the flour in a sieve, and one who kneads dough, and one who bakes.

With regard to the matter itself, it was taught in a baraita in accordance with the opinion of the one who said that the thirty-nine labors of Shabbat correspond to the labors performed in the Tabernacle. As it was taught in a baraita: One is only liable for performing a labor to which there was a corresponding labor in the Tabernacle. They sowed in order to grow dyes for the Tabernacle, and therefore you may not sow on Shabbat. They reaped, and therefore you may not reap on Shabbat.

Whenever the Torah uses the word sheish or bad, it is referring to flax, i.e., linen. Whenever the term techeilet is used, it refers to wool which is dyed sky-blue, i.e., lighter than dark blue. The term argaman refers to wool that is dyed red. And tola'at sheni refers to wool dyed with a gnat.

The term techelet mentioned throughout the Torah refers to wool dyed light blue - i.e., the color of the sky which appears opposite the sun when there is a clear sky.
The term techelet when used regarding tzitzit refers to a specific dye that remains beautiful without changing. [If the techelet] is not dyed with this dye, it is unfit to be used as tzitzit even though it is sky blue in color. For example, using isatis, black dye, or other dark dyes, is unacceptable for tzitzit.
The wool of a ewe that a goat gave birth to is unacceptable for use as tzitzit. How is the techelet of tzitzit dyed? Wool is taken and soaked in lime. Afterwards, it is taken and washed until it is clean and then boiled with bleach and the like, as is the dyers' practice, to prepare it to accept the dye. A chilazon is a fish whose color is like the color of the sea and whose blood is black like ink. It is found in the Mediterranean Sea.
The blood is placed in a pot together with herbs - e.g., chamomile - as is the dyers' practice. It is boiled and then the wool is inserted. [It is left there] until it becomes sky-blue. This is the manner in which the techelet of tzitzit [is made].