'Forty Years' in the Bible

For the LORD your God has blessed you in all the works of your hand: he knows your walking through this great wilderness: these forty years the LORD your God has been with you; you have lacked nothing.

And you shall remember all the way which the LORD your God led you these forty years in the wilderness, to humble you, and to test you, to know what was in your heart, whether you would keep his commandments, or not.

Your clothing grew not old upon you, neither did your foot swell, these forty years.

And I have led you forty years in the wilderness: your clothes have not worn out upon you, and your shoes have not worn out upon your foot.