Jacopo Tintoretto (1518-94), Christ Washes the Feet of the Apostles

Oil on canvas, 80.5 in (204.5 cm.) x 161.5 in (410.2 cm.)
National Gallery, London

The episode in John 13:6-9 is captured at the point when Jesus responds to Peter's refusal to have his feet washed by his master.

Read more about images of the Last Supper.

Source: this page at Wikimedia Commons.