'Tribulation' in the Bible

In the third year of Cyrus king of Persia a message was revealed to Daniel, who was named Belteshazzar; and the message was true and it referred to great conflict (warfare, misery). And he understood the message and had an understanding of the vision.

How blessed [happy, fortunate, spiritually prosperous] and beloved is he who waits expectantly [enduring without wavering for the period of tribulation] and comes to the 1,335 days!