Albert Barnes Commentary Proverbs 5:9

"Lest thou give thine honor unto others, And thy years unto the cruel;" — Proverbs 5:9 (ASV)

Your honor - i.e., “The grace and freshness of your youth” (Daniel 10:8). The thought of this is to guard the young man against the sins that stain and mar it. The slave of lust sacrifices years that might have been peaceful and happy to one who is merciless.