P
Try 1 Samuel 13.1 where the true text reads, 'Saul was one year old when he began to reign and he reigned two years over Israel.'
This indicates that he began to reign in the first stage of life (below 20), and reigned on into middle age (the second stage of life).
There were no recorders in Saul's day
This indicates that he began to reign in the first stage of life (below 20), and reigned on into middle age (the second stage of life).
There were no recorders in Saul's day
https://www.blueletterbible.org/lang/lexicon/lexicon.cfm?Strongs=H4427&t=KJV&bn=9#lexResults
I view the KJV to be a better translation than some of the newer translations.
God bless.