But neither Titus, who was with me, being a Greek, was compelled to be circumcised:
All Commentaries on Galatians 2:3 Go To Galatians 2
Ambrosiaster
AD 400
The implication is “Why should you be circumcised, when Titus was not compelled to undergo circumcision by the apostles? Titus, who had an important role, was accepted without circumcision.”