John Gill Commentary 2 Chronicles 15:13

"and that whosoever would not seek Jehovah, the God of Israel, should be put to death, whether small or great, whether man or woman." — 2 Chronicles 15:13 (ASV)

That whosoever would not seek the Lord God of Israel should be
put to death
That obstinately refused to worship him, and served other gods, which by the law was deserving of death, (Deuteronomy 17:2–6) ,

whether small or great, whether man or woman ;
without any regard to rank or dignity, age or sex.