The Messenger of Allah ﷺ said, "Allah says, 'Son of Adam, if you came to Me with sins nearly filling the earth, yet you did not associate anything with Me, I would meet you with forgiveness nearly filling it.'"
حدثنا محمد بن سابق حدثنا إبراهيم بن طهمان عن منصور عن ربعي بن حراش عن المعرور بن سويد
قال رسول الله ﷺ يقول الله عز وجل يا ابن آدم لو عملت قراب الأرض خطايا ولم تشرك بي شيئا جعلت لك قراب الأرض مغفرة
Its chain of transmission is sahih. Muslim reported it in the Book of Remembrance, 4/2068, no. 2687, and Ibn Majah in the Book of Manners, 2/1255, no. 3821.