John Gill Commentary 1 Kings 22:5

"And Jehoshaphat said unto the king of Israel, Inquire first, I pray thee, for the word of Jehovah." — 1 Kings 22:5 (ASV)

And Jehoshaphat said to the king of Israel, inquire, I pray
you, at the word of the Lord today .
] Being a pious and religious prince, he did not choose to go into a war at once, without consulting the Lord by his prophets, whether it was his will and pleasure they should engage in it, and should prosper; and he was desirous of having this done immediately, before they proceeded any further.