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

Joshua 24:15

If I then, your Lord and Master, have washed your feet; ye also ought to wash one another's feet.

John 13:14