'Word of God' in the Bible

And it came to pass the same night, that the word of God came to Nathan, saying,

All these were of the sons of Heman the king's seer of visions with the word of God, to lift up the horn. God gave to Heman fourteen sons and three daughters.

And his brethren, sons of strength, two thousand and seven hundred heads of the fathers, and David the king will appoint them over the Reubenites, and the Gadites, and the half tribe of the Manassites, for every word of God, and the word of the king.