As the manna furnished by God's creative power saved them from hunger, so by God's providence and care their raiment was marvelously kept from decay, and they had not to go barefoot from their sandals being worn out.
Waxed not old upon thee; literally, did not fall away, waste away from upon thee. This cannot mean that such was the abundant supply of raiment to the Israelites in the Arabian desert, that there was no need for them to wear garments rent and tattered from long use, as they had large flocks and herds whence a sufficient supply of wool and leather could be obtained, and there were among them skilled artificers, by whom these could be made into articles of clothing (Rosenmüller, J.
D. Michaelis, etc.). For, as Knobel observes, "This were something too insignificant beside the miraculous manna; and besides, this does not lie in the expression, which rather intimates that the clothes upon them were not worn out nor fell from them in rags, because God gave them a marvelous durability."
At the same time, there is no reason to suppose that the Israelites did not make use of such supplies as were within their reach for purposes of clothing, any more than that they lived only on manna during the forty years of their wandering.
Still less need we resort to such fanciful suppositions as that the garments of the Israelitish children expanded as they grew up, like the shells of snails—which is the notion of some of the Jewish rabbins, and adopted by some of the Christian Fathers.
Neither did thy foot swell. The verb here is found in only one other passage (Nehemiah 9:21), where this passage is repeated; and the meaning is doubtful. The LXX. render here by ἐτυλώθησαν, became callous; but in Nehemiah the rendering they give is διερράγησαν, were torn, the object torn being, according to the Cod.
Vat; πόδες abbey, their feet, according to the Cod. Alex; τὰ ὑποδήματα affray, their sandals. In Deuteronomy 29:5, the shoe or sandal is specially mentioned in the same connection as here. The verb, however, cannot mean tear or torn, neither does it mean swell; the idea involved is rather that of softening, or, melting or flowing; and the meaning here seems to be, "Thy foot did not get into a bruised and wounded state"—which would have been the case had their sandals not been preserved from breaking or being worn out.