Proverbs 28:7

Whoso keepeth the law is a wise son: but he that is a companion of riotous men shameth his father.
– Proverbs 28:7

This saying brings common wisdom elements together. The structure of the saying is antithetical parallelism. Keeping the law is contrasted with being a companion of gluttons and a wise son is contrasted with shaming one’s father. Gluttony is one of the sins of the incorrigible son in Deuteronomy 21:18-21.

Prior sayings warn against the companionship of gluttons due to waste and poverty (Proverbs 23:19-22). A wise son keeps the law and keeps away from harlots (Proverbs 29:3) and gluttons (Proverbs 23:20) and honors his father.