Speak to the children of Israel… they shall make for themselves tzitzis on the corners of their garments… and put on the tzitzis of the corner a thread of techeiles.
English: From where that tzitzis made by an idolater are invalid? “Speak to the children of Israel and they shall make for themselves tzitzis” — the children of Israel shall make, and not the gentiles shall make.
Type of Learning
Lishmah / Israelite agency in manufacture.
What Is Learned
The act of making tzitzis must be by a Jew; non-Jewish manufacture is disqualified.