Eusebius of Caesarea
Catena Aurea · Lukasevangelium 12
Consider the ravens: for they neither sow nor reap; which neither have storehouse nor barn; and God feedeth them: how much more are ye better than the fowls? And which of you with taking thought can add to his stature one cubit? If ye then be not able to do that thing which is least, why take ye thought for the rest?
By the ravens also he signifies something else, for the birds which pick up seeds have a ready source of food, but those that feed on flesh as the ravens do have more difficulty in getting it. Yet birds of this kind suffer from no lack of food, because the providence of God extends every where; but he brings to the same purpose also a third argument, saying, And which of you by taking thought can add to his stature?