Where in the bible does it say that the Church will go through the Great Tribulation?
The word of God clearly states that believers will escape the tribulation bloodbath.
1 Thessalonians 5:9 (NLT)
[sup]9[/sup] For God chose to save us through our Lord Jesus Christ, not to pour out his anger on us.
Revelation 3:10 (NLT)
[sup]10[/sup] “Because you have obeyed my command to persevere, I will protect you from the great time of testing that will come upon the whole world to test those who belong to this world.
The Thessalonians passage, in context, speaks of the wrath that will be poured out on the unsaved on the Day of the Lord. This verse doesn't say anything about Christians being removed from the earth.
1 Thessalonians 5
Now, brothers and sisters, about times and dates we do not need to write to you, for you know very well that the day of the Lord will come like a thief in the night. While people are saying, “Peace and safety,” destruction will come on them suddenly, as labor pains on a pregnant woman, and they will not escape.
But you, brothers and sisters, are not in darkness so that this day should surprise you like a thief. You are all children of the light and children of the day. We do not belong to the night or to the darkness. So then, let us not be like others, who are asleep, but let us be awake and sober. For those who sleep, sleep at night, and those who get drunk, get drunk at night. But since we belong to the day, let us be sober, putting on faith and love as a breastplate, and the hope of salvation as a helmet. For God did not appoint us to suffer wrath but to receive salvation through our Lord Jesus Christ. He died for us so that, whether we are awake or asleep, we may live together with him. Therefore encourage one another and build each other up, just as in fact you are doing.
[font="'Charis SIL"]Revelation 3:10 was written to the church of Philadelphia, not all end-time believers. Even if one were to interpret the churches as being different eras of church history, the tribulation would be occurring in the age of the Laodicean church, meaning the Philadelphian church would escape tribulation by not living long enough to see it. God has many ways of protecting His people. Protection via rapture here is a huge assumption. [/font]