'Thirty eight' in the Bible

Thirty-eight years had gone by from the time when we came away from Kadesh-barnea till we went over the stream Zered; by that time all the generation of the men of war among us were dead, as the Lord had said.

And the Levites, all those of thirty years old and over, were numbered; and the number of them, by heads, man by man, was thirty-eight thousand.

The door-keepers: the children of Shallum, the children of Ater, the children of Talmon, the children of Akkub, the children of Hatita, the children of Shobai, a hundred and thirty-eight.

One man was there who had been ill for thirty-eight years.