Be on guard! Stay alert! For you do not know when the time is coming. Bible see other translations

“Stay alert! Some Greek texts add “pray” to this verse and read, “Stay alert and pray,” but “pray” is omitted in some early and important manuscripts and therefore is much more likely added to the text than omitted from it. The scribes who copied the text sometimes added things that they themselves did, such as pray or fast.

Commentary for: Mark 13:33