'Serve the Lord' in the Bible

And Pharaoh's servants said unto him, "How long shall this fellow thus plague us? Let the men go that they may serve the LORD their God; or else wilt thou see Egypt first destroyed?"

And then Moses and Aaron were brought again unto Pharaoh, and he said unto them, "Go and serve the LORD your God, but who are they that shall go?"

Nay, not so: but go ye that are men and serve the LORD, for that was your desire." And they thrust them out of Pharaoh's presence.

Then Pharaoh called for Moses and said, "Go and serve the LORD; only let your sheep, and your oxen abide, but let your children go with you."

Our cattle therefore shall go with us, and there shall not one hoof be left behind, for thereof must we take to serve the LORD our God. Moreover, we cannot know wherewith we shall serve the LORD, until we come thither."

And he called unto Moses and Aaron by night, saying, "Rise up, and get you out from among my people: both ye and also the children of Israel, and go and serve the LORD as ye have said.

And see that ye serve the LORD your God, and he shall bless thy bread and thy water, and I will take all sicknesses away from among you.