But [l]transgressors and sinners will be crushed together,
And those who forsake the Lord will come to an end. (Isaiah 1:28 NASB)
This verse describes God’s punishment at the end of the tribulation period, the moment when He comes to set up His Kingdom in Jerusalem. The reason why I am reasonably sure about this is because this verse seems to look to a simultaneous fulfillment with verse 27. The kingdom of “repentant ones” will be established in Jerusalem right as the “transgressors and sinners will be crushed together” at the battle of Armageddon.