Solomon
Proverbs 13:20KJV·traditional attribution

He that walketh with wise men shall be wise: but a companion of fools shall be destroyed.

Matthew Henry Presbyterian

Note, 1. Those that would be good must keep good company, which is an evidence for them that they would be good (men's character is known by the company they choose) and will be a means of making them good, of showing them the way and of quickening and encouraging them in it.

John Gill Reformed Baptist

He that walketh with wise men shall be wise,.... Who is a companion of them that fear the Lord; converses frequently with them in private about spiritual and experimental things, and walks with them in public in all the commandments and ordinances of the Lord; he by those means grows wiser and wiser, gains a large stock of spiritual knowledge and experience; for this holds...

Jamieson-Fausset-Brown Reformed

The benefits of good and evil of bad society are contrasted.