'Letting' in the Bible

But Pharaoh responded, “Who is Yahweh that I should obey Him by letting Israel go? I do not know anything about Yahweh, and besides, I will not let Israel go.”

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

You are still acting arrogantly against My people by not letting them go.

It came about, when Pharaoh was stubborn about letting us go, that the Lord killed every firstborn in the land of Egypt, both the firstborn of man and the firstborn of beast. Therefore, I sacrifice to the Lord the males, the first offspring of every womb, but every firstborn of my sons I redeem.’