Surah Ash-Shu'ara (26:16)

فَأْتِيَا فِرْعَوْنَ فَقُولَآ إِنَّا رَسُولُ رَبِّ ٱلْعَٰلَمِينَ

So go both of you to Pharaoh, and say, “Indeed, we are a messenger of the Lord of all the realms.”