According to Catholicism, why did Jesus tell His disciples to buy a sword?

**According to Catholicism, why did Jesus tell His disciples to buy a sword?** > > 36 But they said: Nothing. Then said he unto them: But now he that hath a purse, let him take it, and likewise a scrip; and he that hath not, let him sell his coat, and buy a sword. > > 37 For I say to you, that is written must yet be fulfilled in me: And with the wicked was he reckoned. For the things concerning me have an end. > > 38 But they said: Lord, behold here are two swords. And he said to them, It is enough.- [Luke 22:36-38](https://www.biblegateway.com/passage/?search=Luke%2022&version=DRA) Have any Church Father or Doctor of the Church offer any insights as to why Our Lord spoke as such? I am rather curious also if the word for ***sword***, could have been the same word used for a dagger? For in such a case, a dagger could in theory also be used as a fork when eating as well as for self defense! In the movie, **The Passion of the Christ**, Peter cuts off the ear of [Malchus](https://en.wikipedia.org/wiki/Malchus#:~:text=According%20to%20the%20Bible%2C%20one,prevent%20the%20arrest%20of%20Jesus.) with what looks more like a dagger in lieu of an actual sword. The Hebrew word **חֶרֶב**: Axe, dagger, knife, mattock, sword, tool for cutting [Strong's Concordance](https://www.quotescosmos.com/bible/bible-concordance/H2719.html#verses)