Solomon
Proverbs 5:9ESV·traditional attribution

lest you give your honor to others and your years to the merciless,

Matthew Henry Presbyterian @wholebiblehenry

Here we have, I. A solemn preface, to introduce the caution which follows, Pro 5:1, Pro 5:2. Solomon here addresses himself to his son, that is, to all young men, as unto his children, whom he has an affection for and some influence upon. In God's name, he demands attention; for he writes by divine inspiration, and is a prophet, though he begins not with, Thus saith the Lord.

Commenting on Proverbs 5:1-14

John Gill Reformed Baptist @doctorgill

Lest thou give thine honour unto others,.... To strumpets, their children, attendants, servants, and friends; that is, either wealth or riches, which make men honourable; or their three, credit, and reputation, which are lost by keeping company with such persons; or the outward comeliness of the body, and inward rigour of the mind, which are impaired by adulterous practices.

Jamieson-Fausset-Brown Reformed @jfbcommentary

thine honour--in whatever consisting, strength (Pro 3:13) or wealth. thy years--by cutting them off in dissipation. unto the cruel--for such the sensual are apt to become.