Quran 5:92 from Surah Al-Maaida on Divine Marvels.
وَأَطِيعُواْ ٱللَّهَ وَأَطِيعُواْ ٱلرَّسُولَ وَٱحۡذَرُواْۚ فَإِن تَوَلَّيۡتُمۡ فَٱعۡلَمُوٓاْ أَنَّمَا عَلَىٰ رَسُولِنَا ٱلۡبَلَٰغُ ٱلۡمُبِينُ
English translation: And obey Allah and obey the Messenger and beware And if you turn away then know only upon Our Messenger (is to) convey (the Message) clearly
Transliteration: wa-ati'u al-laha wa-ati'u al-rasula wa-ih'dharu fa-in tawallaytum fa-i'lamu annama ala rasulina al-balaghu al-mubinu