'Deceitfully' in the Bible

And Moses said, Behold, I go out from thee, and I will entreat Jehovah that the swarms of flies may depart from Pharaoh, from his servants, and from his people, to-morrow: only let not Pharaoh deal deceitfully any more in not letting the people go to sacrifice to Jehovah.

If she please not her master, who hath espoused her to himself, then shall he let her be redeemed: to sell her unto a foreign people he shall have no power, seeing he hath dealt deceitfully with her.