To secure someone else's debt means to use your own possessions as a guarantee. Whether you do this to gain a friend's goodwill or to profit from a stranger (see Exodus 22:25; Leviticus 25:36–37; Deuteronomy 23:19–20), the risk is too high. It could lead to financial ruin. This warning is repeated in Proverbs 11:15; 17:18; 20:16; 22:26; 27:13.