Revelation 2:27

2:27 he will rule them with an iron rod

and like clay jars he will break them to pieces,

Revelation 12:5

12:5 So the woman gave birth to a son, a male child, who is going to rule over all the nations with an iron rod. Her child was suddenly caught up to God and to his throne,

Psalms 2:9

2:9 You will break them with an iron scepter;

you will smash them like a potter’s jar!’”