1 Samuel 12:16-18
King James Version
16 Now therefore stand and see this great thing, which the Lord will do before your eyes.
17 Is it not wheat harvest to day? I will call unto the Lord, and he shall send thunder and rain; that ye may perceive and see that your wickedness is great, which ye have done in the sight of the Lord, in asking you a king.
18 So Samuel called unto the Lord; and the Lord sent thunder and rain that day: and all the people greatly feared the Lord and Samuel.Read full chapter