The Song of David, also known as the PSALM, is a collection of 150 religious poems written by King David in the Hebrew Bible. It is one of the most important books of the Bible and is often referred to as the Bible's 'HYMNAL'. The Psalms are divided into five books, each containing thirty psalms. They are used in Jewish, Christian, and Islamic worship services and are considered to be some of the most beautiful and powerful expressions of faith.