C. F. Keil and Franz Delitzsch on Jeremiah 10:14-15

Jer 10:14-15

In presence of such marvels of divine power and wisdom, all men seem brutish and ignorant (away from knowledge = without knowledge), and all makers of idols are put to shame "because of the image" which they make for a god, and which is but a deception, has no breath of life. נסך, prop. drink-offering, libamen, cf. Jer 7:15; here molten image = מסּכה, as in Isa 41:29; Isa 48:5; Dan 11:8. Vanity they are, these idols made by the goldsmith. A work of mockings, i.e., that is exposed to ridicule when the nullity of the things taken to be gods is clearly brought to light. Others: A work which makes mockery of its worshippers, befools and deludes them (Hitz., Näg.). In the time of their visitation, cf. Jer 6:15.