Zechariah 7:5
"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?"
Cross References (ranked by relevance)
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?
Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God.
Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward.
And when thou prayest, thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
And when ye did eat, and when ye did drink, did not ye eat for yourselves, and drink for yourselves?
And whatsoever ye do, do it heartily, as to the Lord, and not unto men;
And to speak unto the priests which were in the house of the LORD of hosts, and to the prophets, saying, Should I weep in the fifth month, separating myself, as I have done these so many years?
Therefore when thou doest thine alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have their reward.
And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.
And this whole land shall be a desolation, and an astonishment; and these nations shall serve the king of Babylon seventy years.
But all their works they do for to be seen of men: they make broad their phylacteries, and enlarge the borders of their garments,
And when all the captains of the armies, they and their men, heard that the king of Babylon had made Gedaliah governor, there came to Gedaliah to Mizpah, even Ishmael the son of Nethaniah, and Johanan the son of Careah, and Seraiah the son of Tanhumeth the Netophathite, and Jaazaniah the son of a Maachathite, they and their men.
Thus saith the LORD of hosts; The fast of the fourth month, and the fast of the fifth, and the fast of the seventh, and the fast of the tenth, shall be to the house of Judah joy and gladness, and cheerful feasts; therefore love the truth and peace.