Joshua 24:15, 22

And if it seem evil unto you to serve Jehovah, choose you this day whom ye will serve; whether the gods which your fathers served that were beyond the River, or the gods of the Amorites, in whose land ye dwell: but as for me and my house, we will serve Jehovah.

And Joshua said unto the people, Ye are witnesses against yourselves that ye have chosen you Jehovah, to serve him. And they said, We are witnesses.