'Thirty eight' in the Bible

And the days in which we came from Kadesh-barnea, until we had come over the brook Zered were thirty-eight years; until the end of all the generation. The men of war were destroyed from the midst of the camp, as Jehovah swore to them.

And the Levites were numbered from the age of thirty years and upward. And their number by their heads, man by man, was thirty-eight thousand.

The gatekeepers: the sons of Shallum, the sons of Ater, the sons of Talmon, the sons of Akkub, the sons of Hatita, and the sons of Shobai, a hundred and thirty-eight.

And a certain man was there, who had an infirmity thirty-eight years.