Psalm 39 is the 39th psalm of the Book of Psalms, beginning in English in the King James Version: "I said, I will take heed to my ways, that I sin not with my tongue". The Book of Psalms is part of the third section of the Hebrew Bible, and a book of the Christian Old Testament. In the slightly different numbering system used in the Greek Septuagint and Latin Vulgate translations of the Bible, this psalm is Psalm 38. In Latin, it is known as "Dixi custodiam vias meas". It is a meditation on the fragility of man before God, ending in a prayer for a peaceful life.