'Thirty eight' in the Bible

Now, the days in which we journeyed from Kadesh-barnea, as far as where we crossed the ravine of Zered, were thirty-eight years, - until all the generation of the men of war were consumed out of the midst of the camp, as Yahweh had sworn unto them.

Now the Levites were numbered, from thirty years old and upwards, - and their number by their polls, of mature men, was thirty-eight thousand.

The doorkeepers, The sons of Shallum, the sons of Ater, the sons of Talmon, the sons of Akkub, the sons of Hatita, the sons of Shobai, a hundred, and thirty-eight;

And there was a certain man there, who, for thirty-eight years, had continued in his sickness.