Narrated Abu Dhar: Allah’s Messenger (peace and blessings of Allah be upon him) said that Allah said:

He who comes with a good deed, its reward will be ten like that or even more. And he who comes with vice, his reward will be only one like that, or I can forgive him. He who draws close to Me a hand’s span, I will draw close to him an arm’s length. And whoever draws near Me an arm’s length, I will draw near him a fathom’s length. And whoever comes to Me walking, I will go to him running. And whoever faces Me with sins nearly as great as the earth, I will meet him with forgiveness nearly as great as that, provided he does not worship something with me.

(Reported by Muslim, Ibn Majah and Ahmad in his Musnad)