51:38
وَفِى مُوسَىٰٓ إِذْ أَرْسَلْنَـٰهُ إِلَىٰ فِرْعَوْنَ بِسُلْطَـٰنٍۢ مُّبِينٍۢ ٣٨
Saheeh International
And in Moses [was a sign], when We sent him to Pharaoh with clear authority.
Tafsir of "Ibn Kathir" (English)
Lessons from the Destruction of Fir`awn, `Ad, Thamud, and the People of Nuh Allah the Exalted said,وَفِي مُوسَى إِذْ أَرْسَلْنَاهُ إِلَى فِرْعَوْنَ بِسُلْطَانٍ مُّبِينٍAnd in Musa, when We sent him to Fir`awn with a manifest authority.meaning, with clear proof and plain evidence