“just as the LORD had commanded Moses. So Moses numbered them in the Wilderness of Sinai:”
Numbers 1:19 (BSB)
Context Reading
17So Moses and Aaron took these men who had been designated by name, 18and on the first day of the second month they assembled the whole congregation and recorded their ancestry by clans and families, counting one by one the names of those twenty years of age or older, 19just as the LORD had commanded Moses. So Moses numbered them in the Wilderness of Sinai: 20From the sons of Reuben, the firstborn of Israel, according to the records of their clans and families, counting one by one the names of every male twenty years of age or older who could serve in the army, 21those registered to the tribe of Reuben numbered 46,500.