When Jesus told his followers to equip themselves with swords on the final night of his life on earth, he did not have protection in mind.
فَإِذَا رَآكَ تَحْمِلُ سِلَاحًا ،‏ يَزْدَادُ تَوَتُّرُهُ ،‏ وَرُبَّمَا تَنْتَهِي ٱلْمُوَاجَهَةُ بِمَقْتَلِ أَحَدِكُمَا .‏