For the music director, Jeduthun; a psalm of David. I decided, ²  “I will watch what I say and make sure I do not sin with my tongue. ³  I will put a muzzle over my mouth while in the presence of an evil man.” ⁴ 

From the sons of Jeduthun: ¹  Gedaliah, Zeri, ²  Jeshaiah, ³  Hashabiah, and Mattithiah – six in all, ⁴  under supervision of their father Jeduthun, who prophesied as he played a harp, giving thanks and praise to the Lord.