en_tn/zec/14/21.md

every pot in Jerusalem and Judah will be set apart to Yahweh of hosts

Various types of pots and utensils were made especially to be used in the temple for the worship of Yahweh and for the sacrifices. These were considered special, not to be used for anything else.

traders will no longer be in the house of Yahweh

It was the custom for traders to sell the people things they needed in order to make proper sacrifices to Yahweh in the temple. AT: "people will no longer buy or sell things in the courtyard of the temple of Yahweh" (See: rc://en/ta/man/translate/figs-explicit)

traders

Some versions of the Bible translate "traders" as "Canaanites."