Jamieson, Fausset and Brown on Jeremiah 10:9

9. Everything connected with idols is the result of human effort.

Silver spread--(See on Is 30:22; Is 40:19).

Tarshish--Tartessus, in Spain, famed for precious metals.

Uphaz--(Da 10:5). As the Septuagint in the Syrian Hexapla in the Margin, Theodotus, the Syrian and Chaldee versions have "Ophir," Gesenius thinks "Uphaz" a colloquial corruption (one letter only being changed) for "Ophir." Ophir, in Ge 10:29, is mentioned among Arabian countries. Perhaps Malacca is the country meant, the natives of which still call their gold mines Ophirs. Heeren thinks Ophir the general name for the rich countries of the south, on the Arabian, African, and Indian coasts; just as our term, East Indies.

cunning--skilful.