'Forty Years' in the Bible

For Jehovah thy God hath blessed thee in all the work of thy hand; he hath known thy walking through this great wilderness: these forty years Jehovah thy God hath been with thee; thou hast lacked nothing.

And thou shalt remember all the way which Jehovah thy God hath led thee these forty years in the wilderness, that he might humble thee, to prove thee, to know what was in thy heart, whether thou wouldest keep his commandments, or not.

Thy raiment waxed not old upon thee, neither did thy foot swell, these forty years.

And I have led you forty years in the wilderness: your clothes are not waxed old upon you, and thy shoe is not waxed old upon thy foot.