Charles Ellicott Commentary Deuteronomy 28:64

"And Jehovah will scatter thee among all peoples, from the one end of the earth even unto the other end of the earth; and there thou shalt serve other gods, which thou hast not known, thou nor thy fathers, even wood and stone." — Deuteronomy 28:64 (ASV)

And the Lord shall scatter thee among all people. —Fulfilled, literally, in this last dispersion.

Thou shalt serve other gods. —We do not know of Israel’s falling into actual idolatry in dispersion, except in Egypt (Jeremiah 44:17), and possibly in Babylon (Ezekiel 14:22–23. Compare to Deuteronomy 33:25). But they were slaves to the worshippers of other gods.