'Forty Years' in the Bible

For Jehovah thy God blessed thee in every work of thy hand: he knew thy going in this great desert: this forty years Jehovah thy God with thee; thou didst not lack a word.

And remember thou all the way which Jehovah thy God caused thee to go this forty years in the desert in order to humble thee, to try thee, to know what is in thy heart, whether thou shalt watch his commands or not

Thy garments decayed not from thee, and thy feet swelled not this forty years.

And I shall lead you forty years in the desert: your garments did not fall away from you, and thy shoe was not warn away from thy foot