Zechariah 7:5

“You have not brought to Me the sheep of your burnt offerings, Nor have you glorified Me with your sacrifices. I have not burdened you with offerings, Nor wearied you with frankincense.

‘Why have we fasted and You do not see? Why have we afflicted our souls and You do not know?’ Behold, on the day of your fast you find your desire, And oppress all your workers.

‘This whole land will be a waste place and an object of horror, and these nations will serve the king of Babylon seventy years.

“For thus says Yahweh, ‘When seventy years have been fulfilled for Babylon, I will visit you and establish My good word to you, to return you to this place.

Now on the tenth day of the fifth month, which was the nineteenth year of King Nebuchadnezzar, king of Babylon, Nebuzaradan the captain of the bodyguard, who stood before the king of Babylon, came to Jerusalem.

in the first year of his reign, I, Daniel, discerned in the books the number of the years concerning which the word of Yahweh came to Jeremiah the prophet for the fulfillment of the laying waste of Jerusalem, namely, seventy years.

And they do not cry out to Me in their heart When they wail on their beds; For the sake of grain and new wine they gather together as sojourners; They depart from Me.

Then the angel of Yahweh answered and said, “O Yahweh of hosts, how long will You have no compassion for Jerusalem and the cities of Judah, with which You have been indignant these seventy years?”

“Thus says Yahweh of hosts, ‘The fast of the fourth, the fast of the fifth, the fast of the seventh, and the fast of the tenth months will become joy, gladness, and merry appointed feasts for the house of Judah; so love truth and peace.’