God said to Moses as follows: Speak to the Israelite people and instruct them to make for themselves fringes on the corners of their garments throughout the ages; let them attach a cord of blue to the fringe at each corner. That shall be your fringe; look at it and recall all the commandments of God and observe them, so that you do not follow your heart and eyes in your lustful urge. Thus you shall be reminded to observe all My commandments and to be holy to your God. I Adonai am your God, who brought you out of the land of Egypt to be your God: I, Adonai am your God.
10] You shall not plow with an ox and an ass together.
11] You shall not wear cloth combining wool and linen.
12] You shall make tassels on the four corners of the garment with which you cover yourself.
החוטין צריך שיהיו טווין לשמן: (הגה ויש מחמירין אפי' לנפצן לשמן והמנהג להקל בנפוץ) (מרדכי ואגודה סי' כ"ג) שיאמר בתחלת הטווי שהוא עושה כן לשם ציצית או שיאמר לאשה טווי לי ציצית לטלית ואם לא היו טווין לשמן פסולים:
תכלת BLUE PURPLE — It is the blue dye of (obtained from) the blood of the Chilazon.