en_tn/rev/02/27.md

He will rule ... break them into pieces

This is a prophecy from the Old Testament about a king of Israel, but Jesus applied it here to those to whom he gives authority over the nations.

He will rule them with an iron rod

Ruling harshly is spoken of as ruling with an iron rod. Alternate translation: "He will rule them harshly as if striking them with an iron stick" (See: rc://en/ta/man/translate/figs-metaphor)

like clay jars he will break them into pieces

Breaking them to pieces is an image that represents either 1) destroying evildoers or 2) defeating enemies. Alternate translation: "He will defeat his enemies completely as if breaking clay jars into pieces" (See: rc://en/ta/man/translate/figs-simile)