Seven men of his sons - Meaning sons, grandsons, or other near branches of his family. It is supposed that the persons chosen were principal in assisting Saul to exterminate the Gibeonites. But where is the proof of this?
Seven men - Seven was a sacred number not only with the Hebrews but with other Oriental nations Numbers 23:1, Numbers 23:29, and is therefore brought in on this occasion when the judicial death of the sons of Saul was a religious act intended to appease the wrath of God for the violation of an oath Numbers 25:4.
Whom the Lord did choose - Rather, “the Lord‘s chosen,” or elect. The same phrase is applied to Moses Psalm 106:23, to the Israelites Isaiah 43:20, and to Christ Isaiah 42:1.