Dost thou, for dost thou not; for not is plainly understood, as the sense makes evident. Whether this Baalis be a proper name of the king of the Ammonites, or, as some think, an appellative name, signifying the lady or the queen regent, is uncertain. What made the prince of the Ammonites do this can be but guessed; probably the old hatred they had to Israel, or hopes that they should have the better fishing in these waters when they were troubled. Gedaliah seems a man of a good humour, not too credulous, and believes not the information.
Related Commentaries of Jeremiah 40:14
Jeremiah 40:14
14 And said unto him, Dost thou certainly know that Baalis the king of the Ammonites hath sent Ishmael the son of Nethaniah to slayc thee? But Gedaliah the son of Ahikam believed them not.