Deut 4:30 When thou art in tribulation, and all these things are come upon thee, even in the latter days, if thou turn to the LORD thy God, and shalt be obedient unto his voice;
Matt 24:21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
1 Thes 3:4 For verily, when we were with you, we told you before that we should suffer tribulation; even as it came to pass, and ye know.