It happened in the fortieth year, in the eleventh month, on the first day of the month, that Moses spoke to the children of Israel, according to all that Yahweh had given him in commandment to them;

You shall remember all the way which Yahweh your God has led you these forty years in the wilderness, that he might humble you, to prove you, to know what was in your heart, whether you would keep his commandments, or not.

Your clothes

Your clothing didn't grow old on you, neither did your foot swell, these forty years.

"Yes, forty years you sustained them in the wilderness. They lacked nothing. Their clothes didn't grow old, and their feet didn't swell.

"Therefore don't be anxious, saying, 'What will we eat?', 'What will we drink?' or, 'With what will we be clothed?'

And thy shoe

and old and patched shoes on their feet, and wore old garments. All the bread of their provision was dry and moldy.

Take no bag for your journey, neither two coats, nor shoes, nor staff: for the laborer is worthy of his food.

General references

Moses was eighty years old, and Aaron eighty-three years old, when they spoke to Pharaoh.