John Trapp on Isaiah 27:12

Ver. 12. In that day] ſc. When God ſhall have purged his people by his Word, and by his Rod.

The Lord ſhall beat off] Or, ſhall threſh: The Miniſtry of the Word is Gods Flail to ſever the Chaff from Corn: to ſingle his out of the midſt of wicked and prophane worldlings. See the like of Afflictions ſanctified, ver. 9.

And ye ſhall be gathered] As Ears of Corn are for threſhing.

One by one] There is no threſher in the world (ſaith one here) that threſheth half ſo clean: for he looſeth not one grain. See Joh. 17, 12. & 10.3. Chriſt hath a care of every one particularly and by the poll; ſome gather from hence that the calling of the Jews ſhall be general and univerſal.