'Deceitfully' in the Bible

And now swear to me here by God that thou wilt not deal deceitfully with me, nor with my son, nor with my grandson. According to the kindness that I have done to thee, thou shalt do to me, and to the land in which thou sojournest.

And the sons of Jacob answered Shechem and Hamor his father deceitfully, and spoke because he had defiled Dinah their sister --

And Moses said, Behold, I go out from thee, and will intreat Jehovah; and the dog-flies will depart from Pharaoh, from his bondmen, and from his people, to-morrow; only let not Pharaoh deal deceitfully any more in not letting the people go to sacrifice to Jehovah.

My brethren have dealt deceitfully as a stream, as the channel of streams which pass away,

He that hath blameless hands and a pure heart; who lifteth not up his soul unto vanity, nor sweareth deceitfully:

And they act deceitfully every one with his neighbour, and speak not the truth: they teach their tongue to speak falsehood, they weary themselves with perverse dealing.

And after the league made with him he shall work deceitfully, and he shall come up, and shall become strong with a small people.