Mark 13:14

14 But when ye shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not, (let him that readeth understand,) then let them that be in Judaea flee to the mountains:

Mark 13:14 In-Context

12 Now the brother shall betray the brother to death, and the father the son; and children shall rise up against their parents, and shall cause them to be put to death.
13 And ye shall be hated of all men for my name's sake: but he that shall endure unto the end, the same shall be saved.
14 But when ye shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not, (let him that readeth understand,) then let them that be in Judaea flee to the mountains:
15 And let him that is on the housetop not go down into the house, neither enter therein, to take any thing out of his house:
16 And let him that is in the field not turn back again for to take up his garment.
The King James Version is in the public domain.