There Will Be Tribulation
It is Christ alone who used the phrase "Great Tribulation" with reference to the last half of the Tribulation. In Matthew 24:21, Jesus said, "For then there will be a great tribulation, such as has not occurred since the beginning of the world until now, nor ever shall." In this verse Jesus is referring to the event of Matthew 24:15, which describes the revealing of the abomination of desolation, the man also known as the Antichrist. It also should be noted that Jesus in Matthew 24:29-30 states, “Immediately after the tribulation of those days . . . the Son of Man will appear in the sky, and then all the tribes of the earth will mourn, and they will see the Son of Man coming on the clouds of the sky with power and great glory." By this passage, Jesus defines the Great Tribulation (v.21) as beginning with the revealing of the abomination of desolation (v.15) and ending with Christ's second coming (v.30).