NET

12 “When you take a census of the Israelites according to their number, then each man is to pay a ransom for his life to the Lord when you number them, so that there will be no plague among them when you number them.

Darby

12 When thou shalt take the sum of the children of Israel according to those of them that are numbered, then shall they give every man a ransom for his soul to Jehovah on their being numbered, that there be no plague among them on their being numbered.

KJV

12 When thou takest the sum of the children of Israel after their number, then shall they give every man a ransom for his soul unto the LORD, when thou numberest them; that there be no plague among them, when [thou] numberest them.