1 Samuel 12:13-15
13-15"So here's the king you wanted, the king you asked for. God has let you have your own way, given you a king. If you fear God, worship and obey him, and don't rebel against what he tells you. If both you and your king follow God, no problem. God will be sure to save you. But if you don't obey him and rebel against what he tells you, king or no king, you will fare no better than your fathers.
16-17"Pay attention! Watch this wonder that God is going to perform before you now! It's summer, as you well know, and the rainy season is over. But I'm going to pray to God. He'll send thunder and rain, a sign to convince you of the great wrong you have done to God by asking for a king."