﴿ فَلَمَّا جَآءَهُم بِٱلْحَقِّ مِنْ عِندِنَا قَالُوا۟ ٱقْتُلُوٓا۟ أَبْنَآءَ ٱلَّذِينَ ءَامَنُوا۟ مَعَهُۥ وَٱسْتَحْيُوا۟ نِسَآءَهُمْ ۚ وَمَا كَيْدُ ٱلْكَٰفِرِينَ إِلَّا فِى ضَلَٰلٍۢ ﴾

“Now [as for Pharaoh and his followers,] when he came to them, setting forth the truth from Us, they said, “Slay the sons of those who share his beliefs, and spare [only] their women!” - but the guile of those deniers of the truth could not lead to aught but failure.”

Please check ayah 40:27 for complete tafsir.