The Prophet (sal Allahu alayhi wa sallam) said: “Allah, Blessed and Exalted is He, says, ‘O son of Adam, as long as you call on Me, I shall forgive you of what you have done, and think nothing of it. O son of Adam, even if your sins were to reach up to the clouds in the sky, and then you were to ask for My forgiveness, I would forgive you and think nothing of it. O son of Adam, even if you were to come to Me with sins nearly as great as the earth, and then you were to meet Me after death, not worshipping anything besides Me, I would bring you forgiveness nearly as great as the earth.’”

[Tirmidhi]