Numbers 15:38-39

³⁸Speak thou to the sons of Israel, and thou shalt say to them, that they make to them hems by (the) four corners of their mantles, and fasten they in them laces of jacinth; (Speak thou to the Israelites, and thou shalt say to them, beginning now, and forevermore, they shall put tassels on the four corners of their mantles, and fasten a blue ribbon to the tassels;)

³⁹and when they see those, have they mind of all the commandments of the Lord, lest they follow their own thoughts and their eyes, doing fornication by diverse things. (and when they see those things, they shall remember all the Lord’s commands, lest they follow their own thoughts, and their own eyes, and do idolatry with diverse things;)