OT-POET.filter - dby certainty:

dby@Psalms:5:9 @ For there is no certainty in their mouth; their inward part is perversion, their throat is an open sepulchre; they flatter with their tongue.

dby@Proverbs:22:21 @ that I might make thee know the certainty of the words of truth; that thou mightest carry back words of truth to them that send thee?