The Ox: Laws Respecting: Straying to be Brought Back to Its Owner
Source: TTT
Exodus 23:4
If you encounter your enemy’s stray ox or donkey, you must return it to him.
Deuteronomy 22:1, 2
If you see your brother’s ox or sheep straying, you must not ignore it; be sure to return it to your brother. / If your brother does not live near you, or if you do not know who he is, you are to take the animal home to remain with you until your brother comes seeking it; then you can return it to him.