The Catechism in Questions & Answers

667. What is the text of the confirmation vow?

The text of the confirmation vow is as follows: “I renounce Satan and all his work and ways, and surrender myself to You, O triune God, Father, Son, and Holy Spirit, in belief, obedience, and the earnest resolution to remain faithful to You until my end. Amen.”
This brings to expression that the confirmands have the firm resolve to avoid all evil and ungodly things, and diligently follow the path of the gospel. They profess belief in the triune God and announce their intent to conduct their lives in faith and obedience toward God.