This whole land shall be a desolation, and an astonishment; and these nations shall serve the king of Babylon seventy years.
Jeremiah 29:10
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.
2 Chronicles 36:21-2
until the seventy years were fulfilled, just as the prophet had said ... first year of Cyrus king of Persia, that the word of the LORD spoken by the mouth of Jeremiah might be accomplished
Babylon fell in 539 BCE at the Battle of Opis and minus 70 years is 609 BCE the Battle of Megiddo when Necho carried Jehoahaz into Egypt.
2 Chronicles 36:4
Necho took Jehoahaz יואחז his brother and carried him to Egypt
2 Chronicles 36:6
Nebuchadnezzar took Jehoiakim יהויקים and carried him to Babylon
Genesis 11:26-31
Terah lived seventy years, begat Abram ... went forth with them from Ur of the Chaldees
Abram was begetted at 70 years and went out of the land of Chaldee
Genesis 37:28
Joseph (a brother) sold ... brought Joseph into Egypt
a brother was sold to Egypt
Donations
https://www.paypal.com/paypalme/ssech