What cause soever. That is, the cases that might come before the central court at Jerusalem from other cities of the nation. It is clear from this passage that this court at the capital was a supreme court of appeal (see on v. 8).
Between blood and blood. Cases concerning bloodshed (see Deut. 17:8; 19:4-13; Ex. 21:12-15; 22:2; Num. 35:11-33).
Between law and commandment. That is, questions concerning the interpretation and application of the various laws and regulations that made up the Hebrew legal code.
Warn them. Jehoshaphat had admonished the judges to serve faithfully and with a perfect heart, in the fear of the Lord (vs. 6, 7, 9), and now he admonished them that they in turn should admonish the people who came before them to refrain from evil in order that they might not bring judgment upon the nation.