Anas (May Allah be pleased with him) reported:Messenger of Allah (ﷺ) said, "Allah, the Exalted, has said: 'O son of adam, I forgive you as long as you pray to Me and hope for My forgiveness, whatever sins you have committed. O son of 'Adam, I do not care if your sins reach the height of the heaven, then you ask for my forgiveness, I would forgive you. O son of 'Adam, if you come to Me with an earth load of sins, and meet Me associating nothing to Me, I would match it with an earthload of forgiveness."'

-Sunna At -Tirmidhi: Book 1, Hadith 442