There was justice as well as suitable respect to the divine command in this preservation of the children of his father's murderers. The Lord had said this, Deuteronomy 24:16.
Related Commentaries of 2 Chronicles 25:3
2 Chronicles 25:3-4
3 Now it came to pass, when the kingdom was establisheda to him, that he slew his servants that had killed the king his father.
4 But he slew not their children, but did as it is written in the law in the book of Moses, where the LORD commanded, saying, The fathers shall not die for the children, neither shall the children die for the fathers, but every man shall die for his own sin.