Ash-Shu'araa • BN-TAFSEER-IBN-E-KASEER
﴿ قَالَ إِنَّ رَسُولَكُمُ ٱلَّذِىٓ أُرْسِلَ إِلَيْكُمْ لَمَجْنُونٌۭ ﴾
“[Pharaoh] exclaimed: “Behold, [this] your ‘apostle’ who [claims that he] has been sent unto you is mad indeed!”
Please check ayah 26:28 for complete tafsir.