Romans 13:8-10
Let no debt remain outstanding, except the continuing debt to love one another, for he who loves his fellowman has fulfilled the law.
The commandments, “Do not commit adultery,” “Do not murder,” “Do not steal,” “Do not covet,” and whatever other commandment there may be, are summed up in this one rule: “Love your neighbour as yourself.”
Love does no harm to its neighbour. Therefore love is the fulfillment of the law.
1 John 4:20-21
If anyone says, “I love God,” yet hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen.
And He has given us this command: Whoever loves God must also love his brother.