Solomon
Proverbs 5:10ESV·traditional attribution

lest strangers take their fill of your strength, and your labors go to the house of a foreigner,

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 strangers be filled with thy wealth,.... The adulteress, her husband, children, friends, bawds, and such like persons she is concerned with; these share the wealth of the adulterer, abound with it, and live profusely on it, until he is stripped quite bare and destitute: or, "with thy strength"; See Gill on Pro 5:9.

Jamieson-Fausset-Brown Reformed @jfbcommentary

wealth--literally, "strength," or the result of it. labours--the fruit of thy painful exertions (Psa 127:2). There may be a reference to slavery, a commuted punishment for death due the adulterer (Deu 22:22).