Luke 13:4 - Joseph Benson’s Commentary on the Old and New Testaments

Or those eighteen, &c. The case here referred to seems to have occurred lately, and may seem, in some respects, more to the purpose than the former, as there was no human interposition attending the death of these men; so that their destruction appeared to be more immediately from Providence than that of the Galileans, whom Pilate had massacred: on whom the tower in Siloam fell From the fountain of Siloam, which was without the walls of Jerusalem, a little stream flowed into the city, (Isaiah 8:6,) which was received in a kind of basin, thought by some to be the same with the pool of Bethesda. Being near the temple, it is no wonder that many frequented it for purification. And the calamity here spoken of, occasioned by the fall of a neighbouring tower, had probably happened at some late feast; and some of Christ's hearers might then have been at Jerusalem.