1 Samuel 12:16-18

Now therefore stand still and see this great thing that the LORD will do before your eyes. Is it not wheat harvest today? I will call upon the LORD, that he may send thunder and rain. And you shall know and see that your wickedness is great, which you have done in the sight of the LORD, in asking for yourselves a king.” So Samuel called upon the LORD, and the LORD sent thunder and rain that day, and all the people greatly feared the LORD and Samuel.