The Messenger of Allaah (sallallaahu `alaihi wa sallam) said: Allaah, the Mighty and Majestic, said: “Whoever performs a good deed, will have tenfold for it and more. Whoever commits a sin, his recompense will be the same, unless I forgive. Whoever draws closer to Me by a hand’s span, I will draw closer to him by a forearm’s length. Whoever draws closer to Me by a forearm’s length, I will draw closer to him by an arm’s length. And whoever comes to Me walking, I will come to him running. Whoever meets Me with the earth’s fill of sins while associating none with Me, I will meet him its fill of forgiveness.”

Reported by Muslim (2687/6774) in his Saheeh.