'Entreat the Lord' in the Bible

Then Pharaoh called for Moses and Aaron, and said, Entreat the LORD, that he may take away the frogs from me, and from my people; and I will let the people go, that they may do sacrifice unto the LORD.

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

Entreat the LORD (for it is enough) that there be no more mighty thunderings and hail; and I will let you go, and you shall stay no longer.

Now therefore forgive, I pray you, my sin only this once, and entreat the LORD your God, that he may take away from me this death only.