2 Chronicles 31:16
besides registering them by males, from three years old and upward, unto every one that entered into the house of Yahweh, in the need of a day upon its day, - by their service, in their watches, according to their courses:
Ezra 3:4
And they kept the festival of booths, as it was written, - and the ascending-offering of each day upon its own day, by number, according to regulation, the matter of a day upon its day;
Leviticus 21:22-23
Of the food of his God, both of the most holy, - and the holy, may he eat:
1 Chronicles 23:3
Now the Levites were numbered, from thirty years old and upwards, - and their number by their polls, of mature men, was thirty-eight thousand.