'Word of God' in the Bible

Then came the word of God unto Shemaiah the man of God, saying,

And behold, there came a man of God out of Judah with the word of God, to Bethel, as Jeroboam stood by the altar to offer,

For so was it charged me, through the word of God and said to me, 'Eat no bread nor drink water nor turn again by the same way thou wentest."

And the word of God came to him, saying,