Psalms 139:20 - Joseph Benson’s Commentary on the Old and New Testaments

For they speak against thee wickedly It is not so much me that they persecute, in opposing, misrepresenting, and speaking against me, as virtue and piety, in persecuting which they oppose and speak against thee; contemning thy omniscience and omnipresence, and thy superintending providence. And thine enemies take thy name in vain Or, according to the order of the Hebrew words, They take thy name in vain, and are thine enemies. Or, are haters of thee, as it follows, Psalms 139:21. They abuse thy blessed name with oaths, blasphemies, and perjuries, calling thee to witness the truth of their lies and calumnies. Or, as some render the clause, Thine enemies take thee to falsehood, (the words; thy name, being not in the Hebrew,) “they take thee, only to swear falsely by thee.”