1494. Abud-Darda' (radi Allahu anhu) reported: I heard the Messenger of Allah (sal Allahu alaihi wa sallam) saying, "Whenever a Muslim supplicates for his (Muslim) brother in his absence, the angels say: `May the same be for you too'.''
Commentary: This Hadith makes it evident that one who prays for someone in his absence also stands to benefit from it because the angel appointed for the task of praying for those who pray for others will pray for him, saying, "O Allah! Grant him also the same which he has asked for others.''
Allah, the Exalted, says:
"And those who came after them say: `Our Rubb! Forgive us and our brethren who have preceded us in Faith.''' (59:10)
"And ask forgiveness for your sin, and also for (the sin of) believing men and believing women''. (47:19)
"Our Rubb! Forgive me and my parents, and (all) the believers on the Day when the reckoning will be established.'' (14: 41)