Quran 71:3 from Surah Nooh on Divine Marvels.
أَنِ ٱعۡبُدُواْ ٱللَّهَ وَٱتَّقُوهُ وَأَطِيعُونِ
English translation: That Worship Allah and fear Him and obey me
Transliteration: ani u'budu al-laha wa-ittaquhu wa-ati'uni