((اللَّهُمَّ إِنِّي أَسْأَلُكَ بِأَنَّي أَشْهَدُ أَنَّكَ أَنْتَ اللَّهُ لاَ إِلَهَ إِلاَّ أَنْتَ الْأَحَدُ الصَّمَدُ الَّذِي لَمْ يَلِدْ وَلَمْ يُولَدْ وَلَمْ يَكُنْ لَهُ كُفُواً أَحَدٌ)) .
O Allah, I ask You, as I bear witness that You are Allah, none has the right to be worshipped except You, The One, As-Samad Who begets not nor was He begotten and there is none like unto Him. (AS-Samad: The Self-Sufficient Master, Possessor of perfect attributes whom all of creation turn to in all their needs.)
Abu Dawud 2/62, Ibn Majah 2/1267, At-Tirmidhi 5/515, Ahmad 5/360. See also Al-Albani, Sahih Ibn Majah 2/329 and Sahih At-Tirmidhi 3/163.