Surah Ash-Shu'ara 26:16

فَأْتِيَا فِرْعَوْنَ فَقُولَآ إِنَّا رَسُولُ رَبِّ ٱلْعَـٰلَمِينَ

Go to Pharaoh and say, 'We are the messengers of the Lord of the worlds,

Translation: Saheeh International

Tafsir

So the two of you approach Pharaoh and say “Indeed We are — indeed each of the two of us is the Messenger of the Lord of the Worlds to you

Excerpt from Tafsir al-Jalalayn, commentary on 26:16, via Quran.com. The reader has the full commentary and 9 more tafsirs.