Sayyiduna Abu al-Darda' (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him), from Sayyiduna Jibril (peace be upon him), this saying of Allah Almighty: "If My servant comes before Me with sins filling the earth, I will meet him with just as much forgiveness, and I will not care."
At-Tabarani recorded it; its chain contains a narrator, Ala' bin Zayd, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التوبة / 17630