Hadith 1494 - Bab 251 (The Excellence of Supplicating in one's Absence)
Chapter 17 (The Book of Du'a (Supplications))

Abud-Darda' (May Allah be pleased with him) reported: I heard the Messenger of Allah (Peace be upon him) saying, "Whenever a Muslim supplicates for his (Muslim) brother in his absence, the angels say: 'May the same be for you too'."

[Muslim].

Abouddardâ (das) rapporte qu"il a entendu le Messager de Dieu (bsdl) dire: «Toutes les fois que le musulman fait une invocation en faveur de son frère en son absence, l"Ange lui dit: «Et à toi la même chose». (Rapporté par Moslem)

Hadith 1495 - Bab 251 (The Excellence of Supplicating in one's Absence)
Chapter 17 (The Book of Du'a (Supplications))

Abud-Darda' (May Allah be pleased with him) reported: The Messenger of Allah (Peace be upon him) said, "The supplication of a Muslim for his (Muslim) brother in his absence will certainly be answered. Everytime he makes a supplication for good for his brother, the angel appointed for this particular task says: 'A meen! May it be for you, too'."

[Muslim].

Selon lui encore, le Messager de Dieu (bsdl) disait: «Dieu exauce toujours l"invocation que fait le Musulman en faveur de son frère en son absence. Il a du côté de sa tête un Ange spécial qui lui dit à chaque bonne invocation qu"il fait pour son frère: «Amen et à toi la même chose». (Rapporté par Moslem)