Heidelberg Catechism · Lord's Day 37
101. But may we swear an oath by the name of God in a godly manner?
Answer
Yes, when the government demands it of its subjects, or when necessity requires it, in order to maintain and promote fidelity and truth, to God's glory and our neighbor's good. Such an oath is based on God's Word and was therefore rightly used by the saints in the Old and New Testaments.
Scripture references
Question 101 of 129
Study it, question by question
Bosko turns the catechism into a few minutes a day — one question at a time, spaced so the answers actually stick, with an AI companion grounded in the Reformed tradition to talk through whatever you don't yet grasp.