Christ Washing the Disciples' Feet (Tintoretto)
Christ Washing the Disciples' Feet was a favourite theme of Tintoretto, and there are at least six known works by him on the subject. The scene comes from a passage in John 13 where before the Last Supper Christ washes the feet of his disciples.
Source: Wikipedia — Christ Washing the Disciples' Feet (Tintoretto) (CC BY-SA 4.0)