John 13:3-5

that Jesus, knowing that the Father had put everything into His hands, and that He had come from God and was [now] returning to God, got up from supper, took off His [outer] robe, and taking a [servant’s] towel, He tied it around His waist. Then He poured water into the basin and began washing the disciples’ feet and wiping them with the towel which was tied around His waist.