'Serve the Lord' in the Bible

And Pharaoh's servants said to him, How long shall this man be a snare to us? Let the men go, that they may serve the LORD their God: knowest thou not yet that Egypt is destroyed?

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

Not so: go now ye that are men, and serve the LORD; for that you desired. And they were driven out from Pharaoh's presence.

And Pharaoh called to Moses, and said, Go ye, serve the LORD; only let your flocks and your herds be stayed: let your little ones also go with you.

Our cattle also shall go with us; there shall not a hoof be left behind; for of them must we take to serve the LORD our God; and we know not with what we must serve the LORD, until we come thither.

And he called for Moses and Aaron by night, and said, Arise, and depart from among my people, both ye and the children of Israel: and go, serve the LORD, as ye have said.

And ye shall serve the LORD your God, and he will bless thy bread, and thy water; and I will take sickness away from the midst of thee.