(29) باب الدُّعَاءِ بِظَهْرِ الْغَيْبِ
Abu Al-Darda' said:
I heard the Messenger of Allah (ﷺ) say: When a Muslim supplicates for his absent brother the angels say: Amin, and may you receive the like. (ID)
Reference (ID): Sunan Abi Dawud 1534 (ID)
In-book reference (ID): Book 8, Hadith 119 (ID)
English translation (ID): Book 8, Hadith 1529 (ID)