'Seer' in the Bible

All of them were chosen as gatekeepers at the entrances, two hundred and twelve. They were enrolled by genealogies in their villages. They [were] established [by] David and Samuel the seer on account of their faithfulness.

Then Yahweh spoke to Gad the seer of David, saying,

All these [were] sons to Heman, the seer of the king, according to the words of God to raise a horn. And God had given to Heman fourteen sons and three daughters.

And all that Samuel the seer, and Saul the son of Kish, and Abner the son of Ner, and Joab the son of Zeruiah had dedicated--all the dedicated gifts [were] under the hand of Shelomith and his brothers.

Now the words of King David, [from] the first to the last, see, they are written among the words of Samuel the seer, and among the words of Nathan the prophet, and among the words of Gad the seer,