I Samuel 8:7-9

And the LORD said to Samuel, “Heed the voice of the people in all that they say to you; for they have not rejected you, but they have rejected Me, that I should not reign over them. According to all the works which they have done since the day that I brought them up out of Egypt, even to this day—with which they have forsaken Me and served other gods—so they are doing to you also. Now therefore, heed their voice. However, you shall solemnly forewarn them, and show them the behavior of the king who will reign over them.”