Mark 13: 33-37
"Take heed, watch and pray; for you do not know when the time is... Watch therefore, for you do not know when the master of the house is coming--in the evening (Pre-Trib), at midnight (Mid-Trib), at the crowing of the rooster (Pre-Wrath), or in the morning (Post-Trib)-- lest, coming suddenly, he find you sleeping. And what I say to you, I say to all: Watch!'"