John Chrysostom — as excerpted in the Catena Aurea on Matthew 26:51-54

“(Hom. Ixxxiv.) So Luke relates, the Lord had said to His disciples at supper, He that hath a purse, let him take it, and likewise his scrip; and he that hath no sword, let him sell his garment and buy one; (Luke 22:36.) and the disciples answered, Lo, here are two swords. It was natural that there should be swords there for the paschal lamb which they had been eating. Hearing then that the pursuers were coming to apprehend Christ, when they went out from supper they took these swords, as though to fight in defence of their Master against His pursuers.”