20:73
إِنَّآ ءَامَنَّا بِرَبِّنَا لِيَغْفِرَ لَنَا خَطَٰيَٰنَا وَمَآ أَكْرَهْتَنَا عَلَيْهِ مِنَ ٱلسِّحْرِ ۗ وَٱللَّهُ خَيْرٌۭ وَأَبْقَىٰٓ
Indeed, we have believed in our Lord that He may forgive us our sins and what you compelled us [to do] of magic. And Allah is better and more enduring."
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Fir`awn's turning against the Magicians, His threatening Them and Their Reply
Allah, the Exalted, informs of Fir`awn's disbelief, obstinance, transgression and haughtiness against the truth in favor of falsehood. When he saw what he saw of the magnificent miracle and the great sign, and he saw those whose help he sought accept faith in the presence of all of the people, and he was absolutely defeated, he began to behave arrogantly and cast accusations. He resorted to using his esteemed honor and might against the magicians. He warned them and threatened them saying,
ءَامَنتُمْ لَهُ
(Believe you in him (Musa)) This means, "Do you have faith in him"
قَبْلَ أَنْ ءَاذَنَ لَكُمْ
(before I give you permission) meaning, "I have not commanded you to do so, by which you have rebelled against me." Then he said a statement that he, the magicians and all creatures knew was a forgery and an utter lie.