Clement of Alexandria

What, I ask, more graceful, more gay-coloured, than flowers? What, I say, more delightful than lilies or roses? "And if God so clothe the grass, which is to-day in the field, and to morrow is cast into the oven, how much more will He clothe you, O ye of little faith!"

The Instructor Book 2 ↗

Ambrose of Milan

Therefore, if lilies or angels are clothed with glory surpassing that of humans, we must not despair of God's mercy in us, to whom the Lord promises a similar appearance of angels through the grace of resurrection. In this passage, it also seems to address that question, which even the Apostle did not overlook; for the peoples of this world inquire how the dead rise again and with what kind of body they come.

Exposition of the Gospel of Luke, 7.129 ↗

Bede

If then God so clothes the grass in the field, which today is, and tomorrow is cast into the oven, how much more you, O you of little faith? In the Scriptures, tomorrow is understood as a future time, as Jacob says: And tomorrow my righteousness will answer for me (Gen. XXX). And in the vision of Samuel, the witch speaks to Saul: Tomorrow you shall be with me (1 Sam. XXVIII).

On the Gospel of Luke ↗

Bonaventure

Then after the similitude he adds the adaptation and draws the conclusion: But if the grass, which is today in the field and tomorrow is cast into the oven, that is, quickly withers: Psalm: "Let them be as the grass of the housetops, which, before it is plucked up, has withered"; and James 1: "The sun rose with its burning heat and dried up the grass, and its flower fell, and the beauty of its countenance perished"; God so clothes, namely with beautiful ornament and comeliness: "Color itself is called the garment of the flower." How …

Commentary on Luke, Chapter 12 ↗