Or, did use to reveal his mind to Samuel. By the word of the Lord, i.e. by his word, the noun for the pronoun, which is frequent, as Leviticus 14:15, &c.; by his word of command, which he chose to deliver to Israel by his mouth, as it here follows; or by his word of prophecy concerning future events.
Related Commentaries of 1 Samuel 3:21
1 Samuel 3:21
21 And the LORD appeared again in Shiloh: for the LORD revealed himself to Samuel in Shiloh by the word of the LORD.