The Book of Characteristics · Hadith 1167 (#Ḥadīth #1)
Chapter 10 | A Form of Repentance By which Forty Major Sins Are Forgiven
22-12 حدثنا محمد بن علي ماجيلويه رضي الله عنه قال: حدثني عمي محمد بن أبي القاسم، عن أحمد بن أبي عبد الله البرقي، عن الحسن بن محبوب، عن هشام بن سالم، عن أبي عبد الله عليه السلام قال: مامن مؤمن يقترف في يوم وليلة أربعين كبيرة فيقول وهو نادم: "أستغفر الله الذي لا إله إلا هو الحي القيوم، بديع السماوات والارض، ذاالجلال والاكرام، وأسأله أن يتوب علي" إلا غفرها الله له، ثم قال: ولا خير فيمن يقارف في كل يوم وليلة أربعين كبيرة
22-12 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that his uncle Muhammad ibn Abil-Qasim quoted Ahmad ibn Aba Abdullah al-Barqy, on the authority of Al-Hassan ibn Mahboob, on the authority of Hisham ibn Salim that Aba Abdullah as-Sadiq (MGB) said, “God would forgive the sins of any believer who has committed forty major sins in a day and night, but is sorry and repents by saying, ‘I ask for forgiveness from God for which there are no partners; who is Living and Eternal; who has created the heavens and the Earth; Possessor of Grandeur and Honor. I beseech Him to accept my repentance.’”As-Sadiq (MGB) then added, “There are no hopes for one who commits more than forty major sins in a day and night.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).