'Thirty eight' in the Bible

The days in which we came from Kadesh Barnea, until we were come over the brook Zered, were thirty-eight years; until all the generation of the men of war were consumed from the midst of the camp, as Yahweh swore to them.

The Levites were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty-eight thousand.

The porters: the children of Shallum, the children of Ater, the children of Talmon, the children of Akkub, the children of Hatita, the children of Shobai, one hundred thirty-eight.