Deuteronomy 22:1-4

1Thou shalt not see thy brother's ox or his sheep go astray, and hide thyself from them: thou shalt in any case bring them back unto thy brother.

2And if thy brother be not near unto thee, and thou know him not, then thou shalt bring it unto thy house, and it shall be with thee until thy brother seek after it, and thou shalt restore it unto him.

3And so shalt thou do with his ass; and so shalt thou do with his clothing; and so shalt thou do with everything that is lost of thy brother, which he loseth, and thou findest: thou mayest not hide thyself.

4Thou shalt not see thy brother's ass or his ox fall by the way, and hide thyself from them: thou shalt in any case [help] him to lift them up.