King James Version (KJV) - 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 Judæa flee to the mountains:

Berean Study Bible (BSB) - Mark 13:14 >

So when you see the abomination of desolation standing where it should not be (let the reader understand), then let those who are in Judea flee to the mountains.