'Man of God' in the Bible

And the chiefs of the Levites: Hashabiah, Sherebiah, and Jeshua the son of Kadmiel, with their brethren over against them, to praise and give thanks, according to the commandment of David the man of God, watch next to 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 was before them.