Or the Lord does not bid them carry purse and scrip and buy a sword, but predicts that it should come to pass, that in truth the Apostles, forgetful of the time of the Passion, of the gifts and law of their Lord, would dare to take up the sword. For often does the Scripture make use of the imperative form of speech in the place of prophecy. Still in many books we do not find, Let him take, or buy, but, he will take, he will buy.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Reg. Brev. int. 31.