Jer 30:7 Alas! for that day is great, so that none is like it: it is even the time of Jacob's trouble; but he shall be saved out of it.
Jer 30:8 For it shall come to pass in that day, saith the LORD of hosts, that I will break his yoke from off thy neck, and will burst thy bonds, and strangers shall no more serve themselves of him:
Jer 30:9 But they shall serve the LORD their God, and David their king, whom I will raise up unto them.
All of the things in Jeremiah 30 happened during the time of Jacob's trouble. At that time, the yoke between Jacob and Esau was broken off. Esau represents the first born, flesh descendants and Jacob represents the 2nd born, spiritual descendants.
The spiritual Jews have always been under the yoke of bondage of the unsaved Jews UNTIL that yoke was broken at the cross and the flesh descendants were utterly destroyed in AD 70. Jacob will never be under Esau's yoke of bondage ever again.
All of that happened when David their king, Jesus Christ, came and set up his eternal kingdom.