And as he went, he remembered the words of Raphael, and took the ashes of the perfumes, and put the heart and the liver of the fish thereupon, and made a smoke therewith.
All Commentaries on Tobit 8:2 Go To Tobit 8
Bede
AD 735
And the Lord, as he is about to receive the church from the Gentiles as his bride, bids it at first betrothal (in the person of each individual believer) to renounce Satan and all his works and all his pomps, and then to confess its faith in the holy Trinity for the remission of sins, which is the significance of burning up with live coals the innermost entrails of the fish.