Quran 41:6 from Surah Fussilat on Divine Marvels.
قُلۡ إِنَّمَآ أَنَا۠ بَشَرٞ مِّثۡلُكُمۡ يُوحَىٰٓ إِلَيَّ أَنَّمَآ إِلَٰهُكُمۡ إِلَٰهٞ وَٰحِدٞ فَٱسۡتَقِيمُوٓاْ إِلَيۡهِ وَٱسۡتَغۡفِرُوهُۗ وَوَيۡلٞ لِّلۡمُشۡرِكِينَ
English translation: Say Only I am a man like you it is revealed to me that your god (is) God One so take a Straight Path to Him and ask His forgiveness And woe to the polytheists
Transliteration: qul innama ana basharun mith'lukum yuha ilayya annama ilahukum ilahun wahidun fa-is'taqimu ilayhi wa-is'taghfiruhu wawaylun lil'mush'rikina