It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Allah, the Mighty and Majestic, says: Whoever knows that I have the power to forgive sins, I will forgive him, and I do not mind, so long as he does not associate anything with Me."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11565