One which begged the question that the tradition originated with the Apostles, which you have yet to establish, and have only merely asserted.
Genesis 17:9-14; Leviticus 12:3; John 7:22-23; Matthew 28:19-20; Acts 7:8, 10:45, 11:2, 15:1; Romans 2:25; Galatians 2:4, 7, 9, 12 (cf Acts 15:1)...