Numbers 15:38-40

New Revised Standard Version, Anglicised Catholic Edition

³⁸ Speak to the Israelites, and tell them to make fringes on the corners of their garments throughout their generations and to put a blue cord on the fringe at each corner. ³⁹ You have the fringe so that, when you see it, you will remember all the commandments of the Lord and do them, and not follow the lust of your own heart and your own eyes. ⁴⁰ So you shall remember and do all my commandments, and you shall be holy to your God.