Much debate has surrounded Paul’s reason for citing the law of witnesses from Deut 19:15 in 2 Cor 13:1. Despite the existence of alternative theories, the best explanation remains a metaphorical interpretation of the witnesses as Paul’s visits to Corinth. This view has been critiqued for being too far from the original intention of Deut 19:15, but an examination of the law’s appearances in other texts shows that Paul is not alone in his adaptation of this Deuteronomic law. Regulations from rabbinic sources, Qumran, and elsewhere in the New Testament strongly parallel Paul’s own aims, and the seemingly novel aspects of Paul’s citation are mirrored in other texts. Paul admonishes the Corinthians to cease their sinful behavior because his upcoming visit to the city will serve as the third and final witness against their immorality and grant him the authority to administer punishment against them.