NET
15 “So when you see the abomination of desolation—spoken about by Daniel the prophet—standing in the holy place” (let the reader understand),
Darby
15 When therefore ye shall see the abomination of desolation, which is spoken of through Daniel the prophet, standing in [what is a] holy place, (he that reads let him understand,)
KJV
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:)”