«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 inni as`aluka bi-anni achhadu annaka anta llahu la ilaha illa anta l-ahadu ṣ-ṣamad, alladhi lam yalid wa lam yūlad wa lam yakun lahu kufuwan ahad
"O Allah, I ask You, by the fact that I bear witness that You are Allah. There is none worthy of worship but You, the Only God, Independent of creation, who was not begotten and begets not, and none is equal to Him"
It was mentioned in the Hadith that this supplication is the greatest name of Allah that if he is called upon, he will answer and if he is asked with it, he will give