Cross reference
Exodus 23:5
5 If thou see the ass of him that hateth thee lying under his burden, thou shalt forbear to leave him, thou shalt surely release `it' with him.
Deuteronomy 22:4
4 Thou shalt not see thy brother's ass or his ox fallen down by the way, and hide thyself from them: thou shalt surely help him to lift them up again.