And do not make your oaths a means of deceit between you, lest a foot should slip after its stability and you should taste evil because you turned away from Allah's way and grievous punishment be your (lot).

Surely the hypocrites strive to deceive Allah, and He shall requite their deceit to them, and when they stand up to prayer they stand up sluggishly; they do it only to be seen of men and do not remember Allah save a little. (The Women 4.142)

You think you know these people but you forget the world is full of actors and the world is their stage

He is a merchant, the balances of deceit are in his hand: he loveth to oppress.

Deceit is in haste, but honesty can wait a fair leisure

What song the Syrens sang, or what name Achilles assumed when he hid himself among women.