Musnad Ahmad

It is narrated from Hazrat Anas (may Allah be pleased with him) that once I was sitting in a gathering with the Prophet (peace and blessings be upon him), and a man stood up and started praying. After bowing and prostrating, when he sat in the Tashahhud, he recited this supplication: (اللَّهُمَّ إِنِّي أَسْأَلُكَ بِأَنَّ لَكَ الْحَمْدَ لَا إِلَهَ إِلَّا أَنْتَ الْمَنَّانُ يَا بَدِيعَ السَّمَوَاتِ وَالْأَرْضِ يَا ذَا الْجَلَالِ وَالْإِكْرَامِ يَا حَيُّ يَا قَيُّومُ إِنِّي أَسْأَلُكَ) "O Allah! I ask You, for all praise is for You alone, there is no deity except You, You are the Most Gracious, the Originator of the heavens and the earth without any precedent, O Possessor of Majesty and Honor, O Ever-Living, O Sustainer, I ask You." The Prophet (peace and blessings be upon him) said: "You have supplicated to Allah with His Greatest Name; when He is supplicated by it, He surely answers, and when He is asked by it, He surely gives."