Jeremiah 9:5

(5) Deceive.—The word is commonly translated, as in the margin, mock. (So in 1 Kings 18:27; Judges 16:10; Judges 16:13; Judges 16:15.) The context here shows, however, that the kind of mockery is that which at once deludes and derides; and as the former meaning is predominant, the text of the English version had better stand as it is.

To commit iniquity.—Literally, to go crookedly, or, in the strict sense of the word, to do wrong.