Bede

And when David had no sword in his hand, etc. When he had no one and the Lord of his word's minister, through whom he might shatter the pride of the devil by teaching, except whom he himself had first snatched victoriously from the devil; for all are by nature children of wrath, all conceived in iniquities, and in sins are generated by the mother (Ephesians V; Psalm L); he came unexpectedly, and the adversary long strong, as a stronger surpassing him, took away all his weapons, in which he trusted, so that through those whom the …

Commentary on Samuel ↗