«اللَّهُمَّ إِنِّي أَسْأَلُكَ بِأَنِّي أَشْهَدُ أَنَّكَ أَنْتَ اللَّهُ لاَ إِلَهَ إِلاَّ أَنْتَ الأَحَدُ الصَّمَدُ، الَّذِي لَمْ يَلِدْ وَلَمْ يُولَدْ وَلَمْ يَكُنْ لَهُ كُفُوًا أَحَدٌ»
{ورد في الحديث أن هذا الدعاء هو اسم الله الأعظم الذي إذا دُعي به أجاب وإذا سُئل به أعطى}
Allahumma innī as’aluka bi-annī ash'hadu annaka anta llāhu lā ilāha illā anta l-aḥadu ṣ-ṣamadu, alladhī lam yalid wa lam yūlad wa lam yakun lahu kufuwan aḥad
“O Allah, I call upon You by bearing witness that You are Allah. There is none worthy of worship except You, the One, the Absolute Master upon whom all depend, who neither begets nor is begotten, and there is none comparable to Him.”
(It is reported in the Hadith that this supplication contains the Greatest Name of Allah. When invoked by it, He answers, and when requested by it, He grants.)