Surah 51. Az-Zariyat, Ayah 40

This is an illustration of the Qur'anic doctrine that the suffering which is bound to befall an evildoer in this world or in the life to come, or in both, is but a consequence of his own doings.

 Because of his arrogance and disbelief.

The ungodly Egyptians were all destroyed, but the chief blame lay on Pharaoh for misleading them. Pharaoh's punishment was just. He could not blame any one else. And certainly no one can blame the course of Allah's Justice, for Allah was patient, and gave him many chances to repent.