Mark 13:33

Watch out! Stay alert! ¹  For you do not know when the time will come.

Be on guard! Be alert! You do not know when that time will come.

"Take heed, keep on the alert; for you do not know when the appointed time will come.

And since you don’t know when they will happen, stay alert and keep watch.

So keep a sharp lookout, for you don't know the timetable.

Take care, keep watch with prayer: for you are not certain when the time will be.

Beware, keep alert; for you do not know when the time will come.

"Take heed, watch and pray; for you do not know when the time is.

Watch out! Stay alert! ¹  For you do not know when the time will come.

¹ tc The vast majority of witnesses (א A C L W Θ Ψ Ë^1,13 Ï lat sy co) have καὶ προσεύχεσθε after ἀγρυπνεῖτε (agrupneite kai proseucesqe, “stay alert and pray”). This may be a motivated reading, influenced by the similar command in Mark 14:38 where προσεύχεσθε is solidly attested, and more generally from the parallel in Luke 21:36 (though δέομαι [deomai, “ask”] is used there). As B. M. Metzger notes, it is a predictable variant that scribes would have been likely to produce independently of each other (TCGNT 95). The words are not found in B D 2427 a c {d} k. Although the external evidence for the shorter reading is slender, it probably better accounts for the longer reading than vice versa.