Bede : David and his men went to Keilah, etc. The Lord went in His preachers to heal the brokenhearted, and fought against the spirits of falsehood and perfidy, revealing the light of truth and faith, and drove them away from the souls of the redeemed by just separation, in whom they had previously tightly reined in with the bridle of error, as if riding over them, and subjecting them to their own power and domain, used to more effectively and powerfully ravage and subjugate others, and cause them to be anathematized with a great curse. Thus indeed He saved them, who recently avoiding their tentations, earnestly sought His protection. These things were often done from the beginning of the nascent Church, and there is almost no one who doubts that they are done daily through places. — Commentary on Samuel