The Book of the Believer · Hadith 147 (#Ḥadīth #2)

147 - وعن أبي عبد الله عليه السلام قال: أيما مؤمن عاد أخاه المؤمن في مرضه صلى عليه سبعة وسبعون 3 ألف ملك فإذا قعد عنده غمرته الرحمة، و استغفروا له حتى يمسي: فإن عاده مساء كان له مثل ذلك حتى يصبح.

147. It has been reported that Abu 'Abd Allah said: If a believer visits his fellow believer when he is sick, seventy-seven thousand angels will pray for him; and if he sits with him a while, he will be inundated with mercy, and the angels seek forgiveness for him until he retires in the evening; and if he visits in the evening, it shall be the same for him until he rises in the morning.

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