Proverbs 14:5 - Matthew Poole's English Annotations on the Holy Bible

Will not lie, to wit, in common discourse and conversation, whereby he showeth his love to truth, and giveth assurance that when he is called to be a witness, he will be true and faithful. But a false witness will utter lies; or, as the words lie in the Hebrew, and or but he that will utter lies (that accustometh himself to lying) is or will be a false witness, when occasion requires it. Having debauched his conscience by daily lying, he is thereby prepared and disposed to false witness-bearing. Compare Proverbs 12:17.