The book of Psalms is commonly attributed to King David; however, it is actually a collection of writings by a variety of different authors: Moses wrote Psalm 90, Heman the Ezrahite wrote Psalm 88, Ethan the Ezrahite wrote Psalm 89, Solomon (the son of King David) wrote Psalms 72 and 127, King David wrote Psalms 3-9, 11-32, 34-41, 51-65, 68-70, 86, 103, 108-110, 122, 124, 131, 133, and 138-145 , Asaph wrote Psalms 50, and 73-83, the Sons of Korah wrote Psalms 42, 44-45, 47-49, 84-85, and 87, the remaining psalms are of unknown authorship. By the time the Septuagint (the Greek translation of the Hebrew Bible) was written, additional authors were identified: Jeremiah was said to have written Psalm 137, Haggai and Zechariah the Psalms 146-147, Ezra was supposed to have written Psalm 119, Hezekiah may have written Psalms 120-134. The collection of the book of Psalms dates from about 1400 BC to about 500 BC. The Psalms are a collection of songs, hymns and poetry all written to express devotion to and the glory of God.