In Luke 22:37, Jesus immediately links the “sword” remark to Isaiah’s prophecy:
“For I tell you that this Scripture must be fulfilled in me: ‘And he was numbered with the transgressors.’”
The Greek word lēstēs (λῃστής, pl. lēstai) is important here. It doesn’t just mean “thief,” but specifically a bandit or insurrectionist — the kind of outlaw who posed a political threat to Rome (the same word is used of Barabbas in John 18:40).
So, if the disciples carried even a couple of swords, they could legally and socially be branded as an armed group of lēstai (rebels). In Roman eyes, that was enough to justify treating them as dangerous.
This fits with:
- Jesus’ insistence that the Scriptures be fulfilled.
- The later narrative, where He is arrested as though He were a bandit (Luke 22:52: “Have you come out as against a robber, with swords and clubs?”).
- The irony: the disciples misunderstand, but Jesus accepts that two swords are “enough” — not for fighting, but to fulfill the prophetic image of Him being “counted among the lawless.”
In conclusion: “two swords” can be understood not as practical weapons for defense, but as technical markers that allowed the authorities (and the fulfillment of prophecy) to classify Him and His group as rebels.