Deuteronomy 22:12

Fringes, or laces, or strings; partly to bring the commands of God to their remembrance, as it is expressed, Numbers 15:38; and partly as a public profession of their nation and religion, whereby they might be discerned and distinguished from strangers, that so they might be more circumspect to behave themselves as became the people of God, and that they should not be ashamed to own their God and religion before all the world. Wherewith thou coverest thyself: these words are either restrictive to the upper garment, wherewith the rest were covered; or argumentative, why they should use these things, because herewith they might possibly fasten their garments, and prevent the uncovering themselves, as might easily happen, when they wore no breeches, but only loose garments.