Deuteronomy 8:4
"Thy raiment waxed not old upon thee, neither did thy foot swell, these forty years."
Cross References (ranked by relevance)
Deuteronomy 29:5
17
And I have led you forty years in the wilderness: your clothes are not waxen old upon you, and thy shoe is not waxen old upon thy foot.
Nehemiah 9:21
17
Yea, forty years didst thou sustain them in the wilderness, so that they lacked nothing; their clothes waxed not old, and their feet swelled not.