Heidelberg Catechism, Lord's Day 11
Lord's Day 11 of the Heidelberg Catechism addresses the doctrine of justification by faith alone in Christ, presenting this central Reformed truth in catechetical form for instruction and confession. This portion of the Heidelberg Catechism exemplifies the practical catechetical method of the Reformed tradition, designed to teach believers—especially the covenant community—the grounds of their assurance in Christ's righteousness and the exclusivity of faith as the instrument of justification.
[Lord's Day 11 text - parse manually from https://www.crcna.org/welcome/beliefs/confessions/heidelberg-catechism]