סלעים נוזלים / Flowing Rock

(9) Moses took the rod from before ה׳, as he had been commanded. (10) Moses and Aaron assembled the congregation in front of the rock; and he said to them, “Listen, you rebels, shall we get water for you out of this rock?” (11) And Moses raised his hand and struck the rock twice with his rod. Out came copious water, and the community and their beasts drank.

(17) Then Israel sang this song: Spring up, O well—sing to it— (18) The well which the chieftains dug, Which the nobles of the people started With maces, with their own staffs. And from Midbar to Mattanah,

Because of its similarity to Rabbi Ḥanina’s statement, the Gemara cites that which Rabbi Ḥiyya said: One who wants to see Miriam’s well, which accompanied the Jewish people throughout their sojourn in the desert, should do the following: He should climb to the top of Mount Carmel and look out, and he will see a rock that looks like a sieve in the sea, and that is Miriam’s well. Rav said: A spring that is portable, i.e., that moves from place to place, is ritually pure and is regarded as an actual spring and not as drawn water. And what is a movable spring? It is Miriam’s well.

and the mouth of the well: The well of Miriam that went with Israel in the wilderness on all of the journeys. And some say, that it opened its mouth and uttered song, as it stated (Numbers 21:17), "rise up, O well; answer it."

Ten things were created on the eve of the Sabbath at twilight, and these are they: [1] the mouth of the earth, [2] the mouth of the well, [3] the mouth of the donkey, [4] the rainbow, [5] the manna, [6] the staff [of Moses], [7] the shamir, [8] the letters, [9] the writing, [10] and the tablets. And some say: also the demons, the grave of Moses, and the ram of Abraham, our father. And some say: and also tongs, made with tongs.

10. It is forbidden to do any work before havdalah. And if he said havdalah in the prayer it is permitted even though he has not yet made havdalah over the cup. And if one needs to do work prior to saying havdalah in the prayer, he says 'Hamavdil' without a blessing (i.e. without G-d's Name) and then he may do work. RAMA: And likewise women who do not recite the Evening Service and [thus] do not recite Havdalah in the Evening Service on Saturday night, should be instructed to recite Baruch HaMavdil bein kodesh lechol before they perform a labor [forbidden on Shabbos when they have not yet heard] Havdalah recited over a cup [of wine]. [Kol Bo]. There are those who say that all this is regarding a labor that would be forbidden on Shabbat, such as writing or weaving. But lighting a lamp or going from domain to domain does not qualify for this rule. And from this there is a widespread custom to be lenient to light lamps immediately after the congregation says 'Barchu', but the essence is like the first opinion. And there are those who say to draw water from wells or natural springs every Saturday night, because the well of Miriam passes through all the wells and natural springs every Saturday night. And one who touches it and drinks from it will be healed from all his afflictions [Kol Bo]. And I did not see (anything) about this custom. And see above Siman 263, that he who adds from the profane to the holy whether it is permitted to say to him after he has made havdalah to do work for him.