Asaph in Wikipedia

also refers to four men from the Old Testament: Asaph, the father of Joah (2 Kings 18:18, 37) Asaph, son of Berachiah the Gershonite (2 Chronicles 20:14) Asaph, a Levite descendant of Kohath (1 Chr. 26:1) Asaph, the keeper of the king's forest under the Persian king Artaxerxes I Longimanus (Nehemiah 2:8) (The Asaph mentioned in the Old Teastament is the same man, known by different titles. Just as one can see that Melchisedec is an order of priests as opposed to one man or Herod being a title for a king, Asaph is the opposite--he was known by different titles because he had different responsibilities. He wrote Psalm 77 and has been identified as David's chief musician also.)

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