اللَّهُمَّ عَالِمَ الْغَيْبِ وَالشَّهَادَةِ فَاطِرَ السَّمَاوَاتِ وَالْأَرْضِ، رَبَّ كُلِّ شَيْءٍ وَمَلِيكَهُ، أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا أَنْتَ، أَعُوذُ بِكَ مِنْ شَرِّ نَفْسِي وَمِنْ شَرِّ الشَّيْطَانِ وَشِرْكِهِ
Transliteration
Allahumma 'alimal-ghaybi wash-shahadati fatiras-samawati wal-ardi, Rabba kulli shay'in wa malikahu, ashhadu an la ilaha illa anta, a'udhu bika min sharri nafsi wa min sharrish-shaytani wa shirkih
English meaning
O Allah, Knower of the unseen and the seen, Creator of the heavens and the earth, Lord and Sovereign of all things, I bear witness that none has the right to be worshipped except You. I seek refuge in You from the evil of my soul and from the evil and traps of Satan.
When is it recited?
Recited in the morning and evening.
Source
Tirmidhi, Da'awat 14, 3392; Abu Dawud, Adab 101, 5067