Deliver me, O Lord, from the evil man - That is, evidently from some particular man who was endeavoring to injure him; some personal enemy. All the circumstances mentioned agree well with the supposition that Saul is intended.
Preserve me from the violent man - Margin, as in Hebrew, “man of violences.” That is, one who has committed violence so often, who has so frequently done wrong, that this may be considered a characteristic of the man. This would apply well to the repeated acts of Saul in persecuting David, and endeavoring to do him injury.