The title of Psalm 21 is the same as many of the previous Psalms we have studied. It reads, “For the director of music. A psalm of David.” (Psalm 21 Title, NIV). The title identifies both the author and for whose use the Psalm was written. King David, the author of Psalm 21, obviously wrote it for use by ‘the director of music,’ as he led Israel’s national choir during Jewish worship at the Temple of the Lord in Jerusalem. ‘The director of music’ was ‘Heman.’ He was assisted as Israel’s national choir director by two other men in his David-appointed role. They were ‘Asaph’ and ‘Ethan,’ who was also called ‘Jeduthun.’ Ezra wrote, “These are the men David put in charge of the music in the house of the Lord after the ark came to rest there. They ministered with music before the tabernacle, the Tent of Meeting, until Solomon built the temple of the Lord in Jerusalem. They performed their duties according to the regulations laid down for them. Here are the men who served…Heman, the musician…and Heman’s associate Asaph…and from their associates…Ethan son of Kishi…” (I Chronicles 6:31-33a…33c…39a…44a…44c, NIV).