Most Evangelical Christians (including those within the Reformed camp) would not look to the book of Leviticus to derive its order of worship. Reformed Christians pride themselves on being a people who follow the Regulative Principle of Worship (i.e. we must only do what God commands us to do in worship), but when it comes to the rules for the RPW, we more often than not leave it within the confines of the New Covenant Scriptures.

A natural question would be “where did we get the Psalms from?” Well, of course, we understand that the Psalms were written by the inspiration of the Holy Spirit, but other than being written by Him, where did we get them?