abomination of desolation
Jesus directs his disciples to read and understand the book of Daniel so they will not be deceived.
Mathew 24: 4 And Jesus answered and said unto them, Take heed that no man deceive you. 5 For many shall come in my name, saying, I am Christ; and shall deceive many.
Matthew 24:11 And many false prophets shall rise, and shall deceive many. 12 And because iniquity shall abound, the love of many shall wax cold. 13 But he that shall endure unto the end, the same shall be saved. 14 And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come. 15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:) 16 Then let them which be in Judaea flee into the mountains:
Mark 13:14 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: