Hazrat Ata bin Yasar (may Allah have mercy on him) narrates from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that a man came to him and said: I sent a marriage proposal to a woman, but she refused to marry me. Then someone else, other than me, sent her a marriage proposal and she agreed. I became jealous over this and killed her. Is there any way for me to repent? (Sayyiduna Ibn Abbas, may Allah be pleased with them both) said: Is your mother alive? He replied: No. Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: Repent to Allah and seek closeness to Allah as much as you can (through righteous deeds, etc.). (The narrator of the hadith, Hazrat Ata, may Allah have mercy on him, says) I went to Sayyiduna Ibn Abbas (may Allah be pleased with them both) and asked him: Why did you ask him whether his mother was alive? He replied: In my knowledge, there is no deed that brings a person closer to Allah than showing kindness to the mother.