23 So be on your guard; I have told you everything ahead of time.

23 But take ye heed: behold, I have foretold you all things.

23 Watch out! I have warned you about this ahead of time!

23 But take heed; see, I have told you all things beforehand.

23 So be careful. I have warned you about all this before it happens.

23 But take ye heed: behold, I have told you all things beforehand.

23 But do ye take heed: behold, I have told you all things beforehand.

23 Be on your guard! I have told you everything before it happens. 

23 And you must watch! I have told you everything in advance.

23 But be alert; I have already told you everything.

23 But you, watch out! I have told you everything ahead of time!

23 Keep watch! I have told you everything ahead of time.

23 “But take heed; behold, I have told you everything in advance.