Prophethood and divine commission

ٱذْهَبْ أَنتَ وَأَخُوكَ بِـَٔايَـٰتِى وَلَا تَنِيَا فِى ذِكْرِى

Go, you and your brother, with My signs and do not slacken in My remembrance.

ٱذْهَبَآ إِلَىٰ فِرْعَوْنَ إِنَّهُۥ طَغَىٰ

Go, both of you, to Pharaoh. Indeed, he has transgressed.