'Servant of the Lord' in the Bible

So Solomon, and all the congregation with him, went to the high place that was at Gibeon; for there was the tabernacle of the congregation of God, which Moses the servant of the LORD had made in the wilderness.

And the king called for Jehoiada the chief, and said unto him, Why hast thou not required of the Levites to bring in out of Judah and out of Jerusalem the collection, according to the commandment of Moses the servant of the LORD, and of the congregation of Israel, for the tabernacle of witness?

A public notice was sent throughout Judah and Jerusalem to bring in the tax that Moses the servant of the LORD had levied on Israel when they were in the wilderness.