This is Imaan

The tyrant (Pharaoh) threatened to cut off their hands and feet from opposite sides and crucify them. Yet, they said we will not obey you over Allaah. 

Allaah says:

They said, "Never will we prefer you over what has come to us of clear proofs and [over] He who created us. So decree whatever you are to decree. You can only decree for this worldly life.

[Qur'aan 20:72]