'Word of the Lord' in the Bible

Now at that time Samuel had no knowledge of the Lord, and the revelation of the word of the Lord had not come to him.

For to go against his orders is like the sin of those who make use of secret arts, and pride is like giving worship to images. Because you have put away from you the word of the Lord, he has put you from your place as king.

And Samuel said to Saul, I will not go back with you: for you have put away from you the word of the Lord, and the Lord has put you from your place as king over Israel.