John Gill Commentary Nehemiah 9:21

"Yea, forty years didst thou sustain them in the wilderness, [and] they lacked nothing; their clothes waxed not old, and their feet swelled not." — Nehemiah 9:21 (ASV)

Yea, forty years you did sustain them in the wilderness, so that they lacked nothing As not for food, so neither for raiment, as follows:

their clothes did not wear out, and their feet did not swell; of which see (Deuteronomy 8:4).