Numbers 1:2

2 aTake a census of all the congregation of the people of Israel, by clans, bby fathershouses, according to the number of names, every male, head by head.

Numbers 1:18

18and on the first day of the second month, they assembled the whole congregation together, who registered themselves by clans, by fathershouses, according to the number of names from twenty years old and upward, head by head,

Numbers 1:22

22Of the people of Simeon, their generations, by their clans, by their fathershouses, those of them who were listed, according to the number of names, head by head, every male from twenty years old and upward, all who were able to go to war:

Numbers 3:47

47you shall take cfive shekels
A  shekel was about 2/5 ounce or 11 grams
per head; you shall take them according to ethe shekel of the sanctuary (the shekel of twenty gerahs
A  gerah was about 1/50 ounce or 0.6 gram
),
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