Numbers 3:40

40 The LORD said to Moses, “Count all the firstborn Israelite males who are a month old or more and make a list of their names.

Read Numbers 3:40 Using Other Translations

And the LORD said unto Moses, Number all the firstborn of the males of the children of Israel from a month old and upward, and take the number of their names.
And the LORD said to Moses, "List all the firstborn males of the people of Israel, from a month old and upward, taking the number of their names.
Then the LORD said to Moses, “Now count all the firstborn sons in Israel who are one month old or older, and make a list of their names.