Keep Far From Heresy and the Bitterness of the Strange Path

Another interpretation: that he should not set up beside him an advocate [a partisan pleader], as it is said, "the cause of both parties shall come before the judges" (Exodus 22:8). Rabbi Nathan says: "Keep far from a false matter" - this is a warning to keep away from heresy (epikorsut). And so it says, "And I find more bitter than death [the woman whose heart is snares and nets]" (Ecclesiastes 7:26). And it says, "but the king shall rejoice in God" (Psalms 63:12).