Kindness Wipes Out Sin
A man once came to the Prophet Muhammad (peace be upon him) and asked what act of penitence he could perform for a sin he had committed.
The Prophet asked the man if he had a mother.
When the man replied that his mother had died,
The Prophet asked if he had a maternal aunt.
When the man replied that he had, the Prophet said: "Then be kind to her."
Al-Tirmidhi, Hadith 1274