Numbers 15:38-39

³⁸Speak thou to the sons of Israel, and thou shalt say to them, that they make to them hems by four corners of their mantles, and fasten they in them laces of jacinth;

³⁹and when they see those, have they mind of all the commandments of the Lord, lest they pursue or follow their own thoughts and their eyes, doing fornication by diverse things.