'Prophet' in the Bible

And all Israel from Dan even to Beersheba knew that Samuel was established to be a prophet of the LORD.

(Beforetime in Israel, when a man went to inquire of God, thus he spake, Come, and let us go to the seer: for he that is now called a Prophet was beforetime called a Seer.)

And the prophet Gad said unto David, Abide not in the hold; depart, and get thee into the land of Judah. Then David departed, and came into the forest of Hareth.