Deuteronomy 22:4
"Thou shalt not see thy brother’s ass or his ox fall down by the way, and hide thyself from them: thou shalt surely help him to lift them up again."
Cross References (ranked by relevance)
1 Thessalonians 5:14
Now we exhort you, brethren, warn them that are unruly, comfort the feebleminded, support the weak, be patient toward all men.
2 Corinthians 12:15
And I will very gladly spend and be spent for you; though the more abundantly I love you, the less I be loved.
Matthew 5:44
But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Romans 15:1
We then that are strong ought to bear the infirmities of the weak, and not to please ourselves.