This man went up out of his city from year to year to worship and to sacrifice to Yahweh of Hosts in Shiloh. The two sons of Eli, Hophni and Phinehas, priests to Yahweh, were there.
The word "seer" is that which it implies it's a man that is able to see into the spiritual things, or a man who has spiritual perception, and they were called "seers", that was the original word for the prophets. Later on they called them prophets. But in the earlier days they were called seers.Then Saul said to his servant,