{Let him not go down} (m(8820)katabat(935c)). Second aorist active
imperative of katabain(935c) with m(885c) in a prohibition in the third
person singular. The usual idiom here would be m(885c) and the
aorist subjunctive. See  Mr 13:15f.  Mt 24:17f.  when these words
occur in the great eschatological discussion concerning flight
before the destruction of Jerusalem. Here the application is
"absolute indifference to all worldly interests as the attitude
of readiness for the Son of Man" (Plummer).