عَنْ عَبْدِ اللَّهِ بْنِ بُرَيْدَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ رَجُلًا يَقُولُ اللَّهُمَّ إِنِّي أَسْأَلُكَ بِأَنِّي أَشْهَدُ أَنَّكَ أَنْتَ اللَّهُ الَّذِي لَا إِلَهَ إِلَّا أَنْتَ الْأَحَدُ الصَّمَدُ الَّذِي لَمْ يَلِدْ وَلَمْ يُولَدْ وَلَمْ يَكُنْ لَهُ كُفُوًا أَحَدٌ فَقَالَ قَدْ سَأَلَ اللَّهَ بِاسْمِ اللَّهِ الْأَعْظَمِ الَّذِي إِذَا سُئِلَ بِهِ أَعْطَى وَإِذَا دُعِيَ بِهِ أَجَابَ
It is narrated from Sayyiduna Abdullah bin Buraidah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) heard a man reciting these words: "O Allah! I ask You by the fact that I bear witness that surely You are Allah, there is no deity worthy of worship except You, You are One, Unique, Self-Sufficient, who neither begets nor is begotten, and there is none equal to Him." The Prophet (peace and blessings be upon him) said: Indeed, he has called upon Allah by His Greatest Name; when He is asked by it, He gives, and when He is called upon by it, He responds.