NET

6 But he did not execute the sons of the assassins. He obeyed the Lord’s commandment as recorded in the scroll of the law of Moses, “Fathers must not be put to death for what their sons do, and sons must not be put to death for what their fathers do. A man must be put to death only for his own sin.”

Darby

6 But the children of those that smote [him] he did not put to death; according to that which is written in the book of the law of Moses, wherein Jehovah commanded saying, The fathers shall not be put to death for the children, neither shall the children be put to death for the fathers; but every man shall be put to death for his own sin.

KJV

6 But the children of the murderers he slew not: according unto that which is written in the book of the law of Moses, wherein the LORD commanded, saying, The fathers shall not be put to death for the children, nor the children be put to death for the fathers; but every man shall be put to death for his own sin.