Psalms 140:11 - Coke's Commentary on the Holy Bible

Let not an evil speaker— Or, A sycophant shall not. A man of tongue, according to the original; which signifies with the Hebrews a detractor, or sycophant; one who gives his tongue the liberty to vent what mischief he pleases. The Chaldee expresses it remarkably by a delator, or vile informer, with a three-fold, or three-forked tongue; because such a man wounds three at once, the receiver, the sufferer, and himself.