the Prophet, may Allah bless him and grant him peace, used to say: “A Muslim’s supplication for his brother in his absence is answered. An angel is stationed at his head; whenever he supplicates for good for his brother, the angel assigned to him says, ‘Amen, and may you have the same.’”1
Muslim also narrated in his Sahīh from Abū al-Dardā—may Allah be pleased with him—that the Prophet, may Allah bless him and grant him peace, said: “No Muslim servant supplicates for his brother in his absence without the angel saying, ‘And may you have the same.’”2
Among the reports in the Sunnah concerning answered supplication is the hadith authentically narrated in Sahīh al-Bukhārī from Ubāda ibn al-Sāmit—may Allah be pleased with him—that the Prophet, may Allah bless him and grant him peace, said: “Whoever wakes during the night and says, ‘There is no deity worthy of worship except Allah alone, without partner. To Him belongs all dominion and to Him belongs all praise, and He has power over all things. Praise be to Allah, glory be to Allah, there is no deity worthy of worship except Allah, Allah is the Greatest, and there is no might or power except through Allah,’ then says, ‘O Allah, forgive me,’ or makes another supplication, it will be answered. If he performs ablution and prays, his prayer will be accepted.”3
Abū Dāwūd also narrated in his Sunan, as did Ahmad in the Musnad and others, from Muādh ibn Jabal—may Allah be pleased with him—that the Prophet, may Allah bless him and grant him peace, said: “No Muslim retires for the night remembering Allah and in a state of ritual purity, then wakes during the night and asks Allah for any good of this world and the Hereafter, without Allah granting it to him.”4