From this text appears that the seventy years captivity was to be accounted from the first carrying into captivity in the time of Jehoiachin, so that eleven years of it were elapsed before Zedekiah was carried away. Whatever, saith the prophet, these dreamers tell you, you must abide seventy years in Babylon, accounted from your first going thither; it is therefore your wisdom to acquiesce in the will of God, and to compose yourselves; and, to encourage you, the Lord by me assureth you, that after those seventy years shall be expired, as he hath now visited you with evil, so he will visit you for good, and fulfill the promise he hath made to you, and you shall return again to Jerusalem. We have the fulfilling of this recorded in 2 Chronicles 36:21,22 Ezr 1:1. The promise was before, Jeremiah 25:12, Jeremiah 27:22. Daniel understood it from the words of this prophecy, Daniel 9:2, which put him upon prayer at the expiration of that time.
Related Commentaries of Jeremiah 29:10
Jeremiah 29:10
10 For thus saith the LORD, That after seventy years be accomplished at Babylon I will visit you, and perform my good word toward you, in causing you to return to this place.