Isaiah 4:3 - Joseph Benson’s Commentary on the Old and New Testaments

And he that is left in Zion Those that escape the common destruction brought on their countrymen; see Isaiah 4:2; shall be called holy Shall be really such. The Jews that survived the Babylonish captivity, and returned into their own land, were greatly reformed, especially in one point, they relapsed no more into idolatry: and in other respects also a spirit of religion was revived among them. But the prophecy was much more eminently fulfilled in the first converts from Judaism to Christianity, to whose purity and holiness the apostles often bear witness, and of which they glory in their writings. Even every one that is written among the living, &c. Whose names are recorded in the book of life, or the book of the divine knowledge and remembrance, as persons who, by repentance toward God and faith in the Messiah, expected, or already revealed, have passed from death unto life. The phrase is used in allusion to the registers which were kept of the Jewish tribes and families: see notes on Exodus 32:32; Psalms 69:28.