1 Samuel 12:1 - Joseph Benson’s Commentary on the Old and New Testaments

Samuel said unto all Israel While they were assembled together in Gilgal. And this is another instance of Samuel's great wisdom and integrity. He would not reprove the people for their sin, in desiring a king, while Saul was unsettled in his kingdom; lest, through their accustomed levity, they should as hastily cast off their king, as they had passionately desired him; and therefore he chooseth this season for it, because Saul's kingdom was now confirmed by an eminent victory, and because the people rejoiced greatly, applauded themselves for their desires of a king, and interpreted the success which God had given them as a divine approbation of those desires. Samuel, therefore, thinks fit to temper their joys, and to excite them to that repentance which he saw wanting in them, and which he knew to be necessary to prevent the curse of God upon their new king and the whole kingdom.