Solomon
Proverbs 17:4ESV·traditional attribution

An evildoer listens to wicked lips, and a liar gives ear to a mischievous tongue.

Matthew Henry Presbyterian @wholebiblehenry

Note, 1. Those that design to do ill support themselves by falsehood and lying: A wicked doer gives ear, with a great deal of pleasure, to false lips, that will justify him in the ill he does, to those that aim to make public disturbances, catch greedily at libels, and false stories, that defame the government and the administration. 2.

John Gill Reformed Baptist @doctorgill

A wicked doer giveth heed to false lips,.... A man of an ill spirit, of a mischievous disposition, that delights in doing wickedness; he carefully attends to such as speak falsehood; he listens to lies and calumnies, loves to hear ill reports of persons, and takes pleasure in spreading them to the hurt of their characters; and men of bad hearts and lives give heed...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Wicked doers and speakers alike delight in calumny.