16These are the men named out of all the people, chiefs of their fathers' houses, heads of the tribes of Israel.
17And Moses and Aaron took these men, marked out by name;
18And they got together all the people on the first day of the second month; and everyone made clear his family and his father's house, by the number of the names, from twenty years old and over.
19As the Lord had given orders to Moses, so they were numbered by him in the waste place of Sinai.