'Seers' in the Bible

And Gaal said again, See! people are coming down from the middle of the land, and one band is coming by way of the oak-tree of the Seers.

Yet the LORD testified against Israel, and against Judah, by all the prophets, and by all the seers, saying, Turn ye from your evil ways, and keep my commandments and my statutes, according to all the law which I commanded your fathers, and which I sent to you by my servants the prophets.

Now the rest of the acts of Manasseh, and his prayer unto his God, and the words of the seers that spake to him in the name of the LORD God of Israel, behold, they are written in the book of the kings of Israel.

His prayer also, and how God was intreated of him, and all his sin, and his trespass, and the places wherein he built high places, and set up groves and graven images, before he was humbled: behold, they are written among the sayings of the seers.

For the LORD hath poured out upon you the spirit of deep sleep, and hath closed your eyes: the prophets and your rulers, the seers hath he covered.

Which say to the seers, See not; and to the prophets, Prophesy not unto us right things, speak unto us smooth things, prophesy deceits:

The Lord, who has taken up your cause, the Holy One of Israel, says, Because of you I have sent to Babylon, and made all their seers come south, and the Chaldaeans whose cry is in the ships.

Then shall the seers be ashamed, and the diviners confounded: yea, they shall all cover their lips; for there is no answer of God.