Matthew 10:

5: These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into any city of the Samaritans enter ye not:
6: But go rather to the lost sheep of the house of Israel.
7: And as ye go, preach, saying, The kingdom of heaven is at hand.
8: Heal the sick, cleanse the lepers, raise the dead, cast out devils: freely ye have received, freely give.
9: Provide neither gold, nor silver, nor brass in your purses,
10: Nor scrip for your journey, neither two coats, neither shoes, nor yet staves: for the workman is worthy of his meat.

So, they would not have two coats, and should sell the coat to buy swords...