Luke 22:35 And he said unto them, When I sent you without purse, and scrip, and shoes, lacked ye any thing? And they said, Nothing.
[36] Then said he unto them, But now, 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.
The lesson Jesus Christ is teaching is about faith, he sent them out, they had no protection, or Money and they didn't need anything, Yet at this time they have money so they need protection for their money.
Jesus is telling them to have faith, don't trust in the world, trust in me.