'Word of the Lord' in the Bible

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

Why then have you had no respect for the word of the Lord, doing what is evil in his eyes? You have put Uriah the Hittite to death with the sword, and have taken his wife to be your wife; you have put him to death with the sword of the children of Ammon.

And he sent word by Nathan the prophet, who gave him the name Jedidiah, by the word of the Lord.

As for God, his way is perfect; the word of the LORD is tried: he is a buckler to all them that trust in him.

For when David was up in the morning, the word of the LORD came unto the prophet Gad, David's seer, saying,