'Seer' in the Bible

There were two hundred and twelve whose business it was to keep the doorway. These were listed by families in the country places where they were living, whom David and Samuel the seer put in their responsible positions.

Then the word of the Lord came to Gad, David's seer, saying,

All these were sons of Heman, the king's seer in the words of God. And to make great his power God gave Heman fourteen sons and three daughters.

Now all the acts of David, first and last, are recorded in the words of Samuel the seer, and the words of Nathan the prophet, and the words of Gad the seer;