'Man of God' in the Bible

And the heads of the Levites: Hashabiah, Sherebiah, and Jeshua the son of Kadmiel, with their brethren opposite them, to praise and to give thanks, according to the commandment of David the man of God, watch corresponding with watch.

And his brethren, Shemaiah, and Azarel, Milalai, Gilalai, Maai, Nethanel, and Judah, Hanani, with the musical instruments of David the man of God, and Ezra the scribe went before them.