Al-An'am · 6:54

54. When those who accept My signs that indicate the truth of what you have brought come to you, O Messenger, then reply to their greeting of peace in honour of them and tell them the good news of My mercy. I have gracefully made mercy obligatory on Myself. If anyone among you commits sin, out of ignorance and foolishness, and then repents from that sin and sets their actions right, then I will forgive them, for I am Forgiving and Compassionate to the servant who repents to Me.