Sending Prayers upon the Prophet, sallallaahu alaihi wa sallam …
by The Albaani Site
Ammaar bin Yaasir, may Allaah be pleased with him, said, “Allaah’s Messenger, sallallaahu alaihi wa sallam, said:
‘Indeed Allaah has assigned an angel to my grave, He has given him the names of [all] creation. So no-one sends prayers upon me until the Day of Judgement except that he informs me of that person’s name and his father’s name, [saying]: ‘This is so and so the son of so and so, he has sent prayers upon you.’’”
Sahih Al-Targheeb wat-Tarheeb (1667).