Hosea 9:5

What will you do on the day of [the] appointed time, and on the day of the festival of Yahweh?

Isaiah 10:3

And what will you do at [the] day of punishment, and at calamity? It comes from afar! To whom will you flee for help, and where will you leave your wealth,

Jeremiah 5:31

The prophets prophesy {falsely}, and the priests rule {by their own authority}, and my people love [it] so much. But what will you do {when the end comes}?

Hosea 2:11

And I will put an end to all her mirth, her festivals, her new moons, and her Sabbaths, and all her appointed festivals;

Joel 1:13

Gird yourselves and lament, O priests! Wail, ministers of [the] altar! Come spend the night in sackcloth, ministers of my God, because offering and libation are withheld from the house of your God.

Treasury of Scripture Knowledge

Summary

What will ye do in the solemn day, and in the day of the feast of the LORD?

Bible References

In

Hosea 2:11
And I will put an end to all her mirth, her festivals, her new moons, and her Sabbaths, and all her appointed festivals;
Joel 1:13
Gird yourselves and lament, O priests! Wail, ministers of [the] altar! Come spend the night in sackcloth, ministers of my God, because offering and libation are withheld from the house of your God.