I was sitting with the Messenger of Allah ﷺ and a man was offering prayer. He then made supplication: O Allah, I ask Thee by virtue of the fact that praise is due to Thee, there is no deity but Thou, Who showest favour and beneficence, the Originator of the Heavens and the earth, O Lord of Majesty and Splendour, O Living One, O Eternal One. The Prophet ﷺ then said: He has supplicated Allah using His Greatest Name, when supplicated by this name, He answers, and when asked by this name He gives. (Using translation from Abū Dāʾūd 1495)
أَنَّ رَسُولَ اللَّهِ ﷺ سَمِعَ رَجُلًا يَقُولُ اللَّهُمَّ إِنِّي أَسْأَلُكَ بِأَنَّ لَكَ الْحَمْدَ لَا إِلَهَ إِلَّا أَنْتَ أَنْتَ الْمَنَّانُ بَدِيعُ السَّمَاوَاتِ وَالْأَرْضِ ذُو الْجَلَالِ وَالْإِكْرَامِ أَسْأَلُكَ الْجَنَّةَ وَأَعُوذُ بِكَ مِنَ النَّارِ فَقَالَ النَّبِيُّ ﷺ «لَقَدْ كَادَ يَدْعُو اللَّهَ بِاسْمِهِ الَّذِي إِذَا دُعِيَ بِهِ أَجَابَ وَإِذَا سُئِلَ بِهِ أَعْطَى»