John Chrysostom — as excerpted in the Catena Aurea on Matthew 10:23

“(Hom. xxxiv.) Having foretold the fearful things which should come upon them after His Cross, resurrection, and ascension, He leads them to gentler prospects; He does not bid them presumptuously to offer themselves for persecution, but to fly from it; When they persecute you in this city, flee ye to another. For because this was the first beginning of their conversion, He adapts His words to their state.”