The Prophet ﷺ heard a man supplicating, saying, "Allah, I ask You by virtue of my testimony that You are Allah, there is no god but You, the One, the Self-Sufficient Master, who has not begotten and was not begotten, and there is none equal to Him."The Prophet ﷺ said, "By the One in whose hand is my soul, he has asked Allah by His Greatest Name, the name by which when He is called upon He answers, and when He is asked He gives."Zayd said, "I mentioned this to Zuhayr bin Muawiya years later, and he said, 'Abu Ishaq narrated it to me from Malik bin Mughul.'"Zayd said, "Then I mentioned it to Sufyan Thawri, and he narrated it to me from Malik."
حدثنا جعفر بن محمد بن عمران الثعلبي الكوفي حدثنا زيد بن حباب عن مالك بن مغول
سمع النبي ﷺ رجلا يدعو وهو يقول اللهم إني أسألك بأني أشهد أنك أنت الله لا إله إلا أنت الأحد الصمد الذي لم يلد ولم يولد ولم يكن له كفوا أحد قال فقال والذي نفسي بيده لقد سأل الله باسمه الأعظم الذي إذا دعي به أجاب وإذا سئل به أعطى قال زيد فذكرته لزهير بن معاوية بعد ذلك بسنين فقال حدثني أبو إسحق عن مالك بن مغول قال زيد ثم ذكرته لسفيان الثوري فحدثني عن مالك
[Sahih]Reference: Abu Dawud also narrated it in Witr, the chapter on supplication, no. 1494, from the hadith of Zayd bin Hubab through the same chain. Ibn Hibban graded it sahih, no. 2383, and Hakim, 1/504, said it meets the conditions of the two Shaykhs, and Dhahabi agreed with him.