Translation:

16. He said: "because Thou hast thrown me out of the way lo! I will lie in wait for them on Thy straight way.

Notes (Tafseer)

1001. Another instance of Iblis's subtlety and falsehood. He waits till he gets the respite. Then he breaks out into a lie and impertinent defiance. The lie is in suggesting that Allah had thrown him out of the Way, in other words misled him: whereas his own conduct was responsible for his degradation. The defiance is in his setting snares on the Straight Way to which Allah directs men.