Matthew Poole and continuators on Jeremiah 49:39

39 ¶ But it shall come to pass in the latter dayes, that I will bring again the captivity of Elam, saith the LORD .

We had the like promise as to Moah, chap. 48.47. and as to Ammon ver. 6. the same latter dayes either signifie after many dayes, or in the time of the Messias. In the former sense it may refer to Cyrus, who conquered Persia. In the latter sense it is referred to the spiritual liberty which some of these poor heathens were brought into by the Gospel, we read Act. 2.9. that some of these Elamites were at Hierusalem at Pentecost, and were some of those converted to Christ.