The term 'Biblical Song' can be broken down into two crossword solutions: PSALM (5 letters) and CANTICLE (8 letters). A PSALM is a sacred song or poem found in the Bible, typically used in Jewish and Christian worship. It is often attributed to King David and is usually written in poetic form. A CANTICLE is a hymn or song of praise taken from the Bible, typically used in Christian liturgy. It is usually taken from the Old Testament and is often sung during religious services.