An-Nawawi Hadith - 42

قَالَ اللهُ تَعَالَى: يَا ابْنَ آدَمَ، إِنَّكَ مَا دَعَوْتَنِي وَرَجَوْتَنِي، غَفَرْتُ لَكَ عَلَى مَا كَانَ مِنْكَ وَلاَ أُبَالِي، يَا ابْنَ آدَمَ، لَوْ بَلَغَتْ ذُنُوبُكَ عَنَانَ السَّمَاءِ ثُمَّ اسْتَغْفَرْتَنِي، غَفَرْتُ لَكَ، يَا ابْنَ آدَمَ، إِنَّكَ لَوْ أَتَيْتَنِي بِقُرَابِ الأَرْضِ خَطَايَا، ثُمَّ لَقِيْتَنِي لاَ تُشْرِكُ بِي شَيْئاً، لأَتَيْتُكَ بِقُرَابِهَا مَغْفِرَةً رَوَاهُ التَّرْمِذِيُّ وَقَالَ: حَدِيثٌ حَسَنٌ صَحِيحٌ

From Anas, radiyallahu 'anhu, who said: I heard the Messenger of Allah, sallallahu 'alayhi wasallam, say: "Allah the Almighty has said: 'O son of Adam, so long as you call upon Me, and hope in Me, I shall forgive you for what you have done, and I shall not mind. O son of Adam, were your sins to reach the clouds in the sky and were you then to ask forgiveness of Me, I shall forgive you. O son of Adam, were you to come to Me with an earthful of sins and were you then to face Me, without having associated anything with Me, I shall grant you an earthful of pardon.'" [Recorded by Al-Tirmidhi, who said that it is a good and sound hadith]