Phinehas the son of Eleazar the priest. Their messenger was well chosen. He was the representative of the high priest, whose duty it was to call attention to all infringements of the law. He had proved his own fiery zeal for the purity of Israelitish faith and life by his conduct at a critical moment of his countrymen's history, when Balaam's miserable intrigues had brought the Israelites to the brink of destruction (Numbers 25:7).
Such an envoy, if the trans-Jordanic tribes had indeed disobeyed God's command, was well qualified to bring them to a sense of their sin. Once again we find him in his proper position, at the head of the children of Israel ( 20:28), and that was when they were once more assembled to avenge the atrocious crime of the men of Gibeah.