1 Samuel 23:2

Therefore David enquired of the LORD, saying, Shall I go and smite these Philistines? And the LORD said unto David, Go, and smite the Philistines, and save Keilah.

Ver. 2. Therefore David inquired of the Lord.] By his prophet Gad, say most interpreters; for Abiathar was not yet come unto him, 1Sa 23:6 and that which is read of him in 1Sa 22:20 is spoken by way of anticipation. War is to be made by wise counsel, saith Solomon, Pro 24:6 and, long after him, Salust, a heathen historian: surely it is fit that God be consulted - viz., by prayer and searching the Scriptures - ere war be waged; since it is matter of so great weight, and the issue thereof so uncertain. Herein Josiah was too short, and died for it.