Kohelet 10:1-3

Orthodox Jewish Bible

10 Dead flies cause the perfumer’s shemen to send forth a foul odor; so doth a little sichlut outweigh chochmah and kavod.

² A chacham’s lev is at his yamin (right hand); but a kesil’s lev is at his semol (left hand).

³ Yea also, when he that is a kesil even walketh along the derech, his sense faileth him, and he saith to every one that he is a kesil.