'Word of God' in the Bible

As they were going down to the end of the city, Samuel said to Saul, Tell the servant to pass on before us (and he passed on), but stand thou still now, that I may cause thee to hear the word of God.

And the counsel of Ahithophel, which he counselled in those days, was as if a man had inquired of the word of God: so was all the counsel of Ahithophel both with David and with Absalom.

But the word of God came to Shemaiah the man of God, saying,

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