Portion — God, who vouchsafes to be the portion of his people. The former — Idols are things framed or formed, but God is the former of all things. The rod of his inheritance — So called, because the inheritances of Israel were measured by a line, reed, or rod.
Related Commentaries of Jeremiah 10:16
Jeremiah 10:16
16 The portion of Jacob is not like them: for he is the former of all things; and Israel is the rod of his inheritance: The LORD of hosts is his name.