John Gill Commentary Jeremiah 10:15

"They are vanity, a work of delusion: in the time of their visitation they shall perish." — Jeremiah 10:15 (ASV)

They are vanity. They are the fruit of the vain imagination of men; to worship them shows the vanity of the human mind; and they are vain things to trust to: and the work of errors; of erroneous men, and which lead men into errors; and are worthy to be laughed at, as the Targum paraphrases it. In the time of their visitation they shall perish; or in the time that I shall visit upon them their sins, as the Targum; that is, when Babylon should be destroyed by the Medes and Persians, as Kimchi interprets it; when their idols were destroyed also; see (Isaiah 46:1) .