'Forty Days' in the Bible

In my going up to the mount to take the tables of stone, the tables of the covenant which Jehovah made with you, and I shall dwell in the mountain forty days and forty nights; I ate not bread and I drank not water:

And it shall be from the end of forty days and forty nights, Jehovah gave to me the two tables of stone, the tables of the covenant.

And I shall fall down before Jehovah as at the first; forty days and forty nights I ate not bread and I drank not water on account of all your sins that ye sinned to do evil in the eyes of Jehovah to provoke him

And I shall fall down before Jehovah forty days and forty nights, as I fell down; for Jehovah said to destroy you.

And I stood in the mount according to the first days, forty days and forty nights; and Jehovah will hear to me also in this time; Jehovah was not willing to destroy thee.