Ecclesiastes 10:13

“The beginning of the words of his mouth [is] foolishness, etc.] As soon as ever he opens his mouth, he betrays his folly; the first word he speaks is a foolish one; or it is from the abundant folly in his heart that he speaks, which is the source and spring of all his foolish talk; and the end of his talk [is] mischievous madness; to himself and others; as he goes on, he appears more and more foolish, and yet more confident of his own wisdom; and is resolutely set on having his own way and will; grows warm, and is violently hot, to have his own words regarded; and, if contradicted, is like a madman, scattering arrows, firebrands, and death; his talk from first to last is a circle of folly;…”

“Illustrating the folly and injuriousness of the fool's words; last clause of Ecc 10:12.”

“beginning: Jdg 14:15; Sa1 20:26-33, Sa1 22:7, Sa1 22:8, Sa1 22:16-18, Sa1 25:10, Sa1 25:11; Sa2 19:41-43; Sa2 20:1; Kg2 6:27, Kg2 6:31; Pro 29:9; Mat 2:7, Mat 2:8, Mat 2:16; Luk 6:2, Luk 6:11; Luk 11:38, Luk 11:53, Luk 11:54; Joh 12:10; Act 5:28-33, Act 6:9-11, Act 7:54-59, Act 19:24-28 talk: Heb. mouth Ecclesiastes 10:14”

“"The beginning of the words of his mouth is foolishness; and the end of his mouth is mischievous madness." From folly (absurdity) the words which are heard from a fool's mouth rise to madness, which is compounded of presumption, wantonness, and frenzy, and which, in itself a symptom of mental and moral depravity, brings as its consequence destruction on himself ( Pro 18:17). The adjective רעה is as in רע חלי, which interchanges with רעה חו Ecc 6:2; Ecc 5:12, etc. The end of his mouth, viz., of his speaking, is = the end of the words of his mouth, viz., the end which they at last reach. Instead of holeloth, there is here, with the adj. following, holeluth, with the usual ending of abstracta.…”