Albert Barnes Commentary Proverbs 16:27-30

"A worthless man deviseth mischief; And in his lips there is as a scorching fire. A perverse man scattereth abroad strife; And a whisperer separateth chief friends. A man of violence enticeth his neighbor, And leadeth him in a way that is not good. He that shutteth his eyes, [it is] to devise perverse things: He that compresseth his lips bringeth evil to pass." — Proverbs 16:27-30 (ASV)

The four verses speak of the same thing, and the well-known reproachful name, "man of Belial," stands at the beginning, stigmatizing the man who delights in causing the mischief they describe.

Diggeth up evil—that is, he digs an evil pit for others to fall into .

Proverbs 16:30 describes the physiognomy of the man of Belial: the half-closed eyes that never look you straight in the face, and the restlessness or cunning of which biting the lips is the surest indication .