Richard Bell

Although it is the unpardonable sin to worship any other but God, yet the Qur'an teaches that 'Azazil or Iblis was cast out of God's favour because he refused to worship Adam. — C.G. Pfander

Behold! We said to the angels: "Bow down unto Adam": They bowed down except Iblis: He said, "Shall I bow down to one whom Thou didst create from clay?" Surah 17:61