'Word of the Lord' in the Bible

And the child Samuel ministered unto the LORD before Eli. And the word of the LORD was rare in those days; there was no open vision.

Now Samuel did not yet know the LORD, neither was the word of the LORD yet revealed unto him.

And the LORD appeared again in Shiloh: for the LORD revealed himself to Samuel in Shiloh by the word of the LORD.

Then came the word of the LORD unto Samuel, saying,

For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry. Because you have rejected the word of the LORD, he has also rejected you from being king.

And Samuel said unto Saul, I will not return with you: for you have rejected the word of the LORD, and the LORD has rejected you from being king over Israel.