And this whole land shall be a desolation, [and] an astonishment; and these nations shall serve the king of Babylon seventy years. (25:11)

And it shall come to pass, when seventy years are accomplished, [that] I will punish the king of Babylon, and that nation, saith the Lord, for their iniquity, and the land of the Chaldeans, and will make it perpetual desolations. (25:12)

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. (29:10)

--Daniel--

In the first year of his reign I Daniel understood by books the number of the years, whereof the word of the Lord came to Jeremiah the prophet, that he would accomplish seventy years in the desolations of Jerusalem. (9:2)

--Zechariah--

Then the angel of the Lord answered and said, O Lord of hosts, how long wilt thou not have mercy on Jerusalem and on the cities of Judah, against which thou hast had indignation these threescore and ten years? (1:12)

Speak unto all the people of the land, and to the priests, saying, When ye fasted and mourned in the fifth and seventh [month], even those seventy years, did ye at all fast unto me, [even] to me? (7:5)