The Book of Occultation — al-Ṭūsī · Hadith 535 (#Ḥadīth #18)

وخرج فيه: غفر الله لك ذنبك ورحمنا وإياك ورضي عنك برضائي عنك.

Another epistle was issued with regard to him that Almighty Allah has forgiven your sin and has been merciful to us and you and because I am pleased with you, Almighty Allah is also pleased with you.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).