7 When Phinehas the son of Eleazar , the son of Aaron the priest , saw it, he arose from the midst of the congregation and took a spear in his hand ,

Matthew Henry's Commentary on Numbers 25:7

Commentary on Numbers 25:6-15

(Read Numbers 25:6-15)

Phinehas, in the courage of zeal and faith, executed vengeance on Zimri and Cozbi. This act can never be an example for private revenge, or religious persecution, or for irregular public vengeance.