Sahih Muslim · Hadith 7010
The Book Pertaining to the Remembrance of Allah; Supplication; Repentance and Seeking Forgiveness - كتاب الذكر والدعاء والتوبة والاستغفار
حدثنا أبو كريب، حدثنا أبو معاوية، عن الأعمش، بهذا الإسناد . نحوه غير أنه قال " فله عشر أمثالها أو أزيد " .
A hadith like this has been transmitted on the authority of A'mash with the same chain of transmitters and he (further) said: There is for him ten like that (the good he performed) or more than that.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).