"If you meet your enemy's ox or his donkey going astray, you shall surely bring it back to him again.
Exodus 23:4
Surrounding context
23:3 You shall not show partiality to a poor man in his dispute.
23:4 "If you meet your enemy's ox or his donkey going astray, you shall surely bring it back to him again.
23:5 If you see the donkey of one who hates you lying under its burden, and you would refrain from helping it, you shall surely help him with it.