Benhail was one of the princes sent by the godly king Jehoshaphat, along with other princes, Levites and priests to teach about the Lord in the cities of Judah. The other princes were Obadiah, Zechariah, Nethaneel, Michaiah (2 Chronicles 17:7). The Levites were Shemaiah, Nethaniah, Zebadiah, Asahel, Shemiramoth, Jehonathan, Adonijah, Tobijah, Tobadonijah, and the priests were Elishama and Jehoram (2 Chronicles 17:8) They had the law of the Lord with them as they taught the people in the cities of Judah and great fear came on the kingdoms of the land surrounding Judah and so they did not war against king Jehoshaphat.

What can we learn from Benhail and the other princes, Levites and priests?
Like Benhail (and the others), we must be teachers of the law of the Lord in the cities that the King of kings and the Lord of lords sends us to. The law that was fulfilled by Jesus, the Christ, who came to convert (resurrect) our souls from being under judgment to being under grace; setting us up on himself, the ROCK of our salvation (Psalm 18:2), bringing us up out of the horrible pit and miry clay of sin that had us stuck in the path of death of destruction (Psalm 40:2; Psalm 19:7). This we must teach the people.

Psalm 19:7a (KJV)
7 The law of the LORD is perfect, converting the soul: …

Psalm 1:1-2 (KJV)
1 Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful.
2 But his delight is in the law of the LORD; and in his law doth he meditate day and night.