An-Nur · 24:22

22. The people of virtue in religion and expanse in wealth should not swear an oath to stop giving their needy relatives, due to their poverty, amongst the migrants in Allah’s way, due to a sin they committed. They should pardon them and overlook them. Do you not love that Allah should forgive your sins when you pardon them and overlook them? Allah is Forgiving to those who repent amongst His servants and Merciful to them, so His servants should follow Him. This verse was revealed regarding Abu Bakr Siddiq (may Allah be pleased with him) when he swore an oath to stop spending on Mistah, due to his joining in the slander.