The Greatest Name of Allah, by which, when He is called upon, He answers, and when He is asked, He gives

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that he said: We were with the Prophet (peace and blessings be upon him) in a circle, and a man was standing and praying. When he had bowed and prostrated, completed the tashahhud and supplicated, he said in his supplication: 'Allahumma inni as'aluka bi-anna lakal-hamd, la ilaha illa ant, badi'us-samawati wal-ard, ya Dhal-Jalali wal-Ikram, ya Hayyu ya Qayyum' (O Allah, I ask You by virtue of the fact that all praise is Yours; there is no god but You, the Originator of the heavens and the earth without any precedent; O Possessor of Majesty and Bounty and Honour! O Ever-Living, O Sustainer of all!). Then the Prophet (peace and blessings be upon him) said: "He has supplicated by that Greatest Name of Allah by which, when He is called upon, He answers, and when something is asked of Him, He gives."
This hadith is sahih on the condition of Imam Muslim, but the two Shaykhs did not record it.

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) heard a man saying: 'Allahumma inni as'aluka bi-anna lakal-hamd, la ilaha illa ant, al-Mannan, badi'us-samawati wal-ard, Dhul-Jalali wal-Ikram, as'alukal-jannah, wa a'udhu bika minan-nar' (O Allah, I ask You by virtue of the fact that all praise is Yours; there is no god but You; You are the Most Bountiful and the Creator of the heavens and the earth; O Possessor of Majesty and Honour! I ask You for Paradise and I seek refuge in You from the Fire of Hell). Then the Prophet (peace and blessings be upon him) said: "He very nearly supplicated to Allah by that Name of His by which, when He is called upon, He answers, and when He is asked, He gives."

Abdullah bin Buraydah al-Aslami narrates from his father that the Prophet (peace and blessings be upon him) heard a man saying: 'Allahumma inni as'aluka bi-annaka antallahu la ilaha illa ant, al-Ahadus-Samad, alladhi lam yalid wa lam yulad, wa lam yakun lahu kufuwan ahad' (O Allah, I ask You, for indeed You are Allah; there is no god but You, the One, the Self-Sufficient, who has no child, nor is He the child of anyone, and there is none equal to Him). Then the Prophet (peace and blessings be upon him) said: "You have certainly asked Allah by His Greatest Name, by which, when He is asked, He gives, and when He is called upon, He answers."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Buraydah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) heard a man saying: 'Allahumma inni as'aluka bi-annaka Ahadun Samad, lam yalid wa lam yulad, wa lam yakun laka kufuwan ahad' (O Allah, I ask You by virtue of the fact that You are One, Self-Sufficient; You neither begot anyone nor were You begotten, and there is none equal to You). He (peace and blessings be upon him) said: "He has certainly asked Allah by His Greatest Name, or he said: His Most Great Name, by which, when He is called upon, He answers, and when He is asked, He gives."
This is a supporting narration (shahid) for the previous hadith, whose chain is sahih on the condition of Imam Muslim.