NET
9 God will severely judge Abner if I do not do for David exactly what the Lord has promised him,
Darby
9 So do God to Abner, and more also, if, as Jehovah has sworn to David, I do not so to him;
KJV
9 So do God to Abner, and more also, except, as the LORD hath sworn to David, even so I do to him;