Albert Barnes Commentary 1 Samuel 12:6

"And Samuel said unto the people, It is Jehovah that appointed Moses and Aaron, and that brought your fathers up out of the land of Egypt." — 1 Samuel 12:6 (ASV)

Advanced - This refers to appointing them to their office. The word literally means “made” (1 Kings 12:31; Hebrews 3:2).

Samuel’s purpose is to impress upon the people the conviction that Yahweh was their God and the God of their fathers. He reminds them that they owed their national existence and all their blessings to Him, and that faithfulness to Him—to the exclusion of all other worship (1 Samuel 12:21)—was the only safety for the newly established monarchy. Notice the constant reference to the Exodus as the well-known turning point in their national life (see 1 Samuel 4:8; 1 Samuel 6:6).