Repentance and Allah's Mercy

On the authority of Ibn Abbas (may Allah be pleased with him), that the Messenger of Allah (peace and blessings of Allah be upon him) said: Verily Allah has pardoned [or been lenient with] for me my ummah: their mistakes, their forgetfulness, and that which they have been forced to do under duress.

On the authority of Anas (may Allah be pleased with him) who said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) say, “Allah the Almighty has said: ‘O Son of Adam, as long as you invoke Me and ask of Me, I shall forgive you for what you have done, and I shall not mind. O Son of Adam, were your sins to reach the clouds of the sky and you then asked forgiveness from Me, I would forgive you. O Son of Adam, were you to come to Me with sins nearly as great as the Earth, and were you then to face Me, ascribing no partner to Me, I would bring you forgiveness nearly as great as it [too].’ ”