Psalm 1 is the first psalm of the Book of Psalms, beginning in the English King James Version with "Blessed is the man"; Alexander Kirkpatrick argued that it formed "an appropriate prologue" to the whole collection. The Book of Psalms is part of the third section of the Hebrew Bible. It is also a book of the Christian Old Testament. In Latin, the psalm is known as "Beatus vir" or "Beatus vir, qui non abiit".
The psalm is a regular part of the Jewish liturgy as well as the liturgies of the Catholic Church and Lutheran, Anglican, and other Protestant forms of Christianity.