Isaiah

This panel used to hang to the left of a painting with Christ as Salvator Mundi, saviour of the world. That is what the prophet Isaiah points at in this panel. The triptych was made for the Billi chapel in the church of Santissima Annunziata in Florence.

The tablet reads "ecce deus salvator meus", Latin for "Behold, God is my salvation", a line in Isaiah 12:2.

To the right of the Salvator was a portrait of Job, also shown from head to toe and also showing a text. Isaiah is said to have announced the coming of Christ, and Job is said to have announced his resurrection. That explains their positions next to the Saviour of the World.