Proverbs 20:28-30

Amplified Bible

²⁸ 
Loyalty and mercy, truth and faithfulness, protect the king,
And he upholds his throne by lovingkindness.
²⁹ 
The glory of young men is their [physical] strength,
And the honor of aged men is their gray head [representing wisdom and experience].
³⁰ 
Blows that wound cleanse away evil,
And strokes reach to the innermost parts.