Exodus 23:5 "You shall not refrain from helping him"

Helping a person in time of need is not just an act of kindness, it is also one of the commandments of the Torah.

If we see a person or an animal in need of assistance, we must help him.

Positive Mitzvah 202 commands us to unload a burden from a person or animal which has fallen under this burden. This Negative Mitzvah forbids us from leaving him helpless.