The source of Tribulation during the seven year Tribulation period is primarily the execution of God’s wrath on the earth. This wrath, as we will see from the following verses, is different from what we have now. It is much more intense and with a purpose. Here, without any comment, is a few references on the One who will bring wrath to the earth during the Tribulation period. Notice, for emphasis the bold type.

Isaiah 24:1-6

Behold, the Lord lays the earth waste, devastates it, distorts its surface, and scatters its inhabitants. 2 And the people will be like the priest, the servant like his master, the maid like her mistress, the buyer like the seller, the lender like the borrower, the creditor like the debtor. 3 The earth will be completely laid waste and completely despoiled, for the Lord has spoken this word. 4 The earth mourns and…