The Angel Descending at the Close of the Circle of the Proud
From Purgatorio XII:
With equal pace as oxen in the yoke, I with that laden spirit journey'd on Long as the mild instructor suffer'd me; But when he bade me quit him, and proceed (For "here," said he, "behooves with sail and oars Each man, as best he may, push on his bark"), Upright, as one dispos'd for speed, I rais'd My body, still in thought submissive bow'd. I now my leader's track not loth pursued; And each had shown how light we far'd along When thus he warn'd me: "Bend thine eyesight down: For thou to ease the way shall find it good To ruminate the bed beneath thy feet." As in memorial of the buried, drawn Upon earth-level tombs, the sculptur'd form Of what was once, appears (at sight whereof Tears often stream forth by remembrance wak'd, Whose sacred stings the piteous only feel), So saw I there, but with more curious skill Of portraiture o'erwrought, whate'er of space From forth the mountain stretches. On one part Him I beheld, above all creatures erst Created noblest, light'ning fall from heaven: On th' other side with bolt celestial pierc'd Briareus: cumb'ring earth he lay through dint Of mortal ice-stroke. The Thymbraean god With Mars, I saw, and Pallas, round their sire, Arm'd still, and gazing on the giant's limbs Strewn o'er th' ethereal field. Nimrod I saw: At foot of the stupendous work he stood, As if bewilder'd, looking on the crowd Leagued in his proud attempt on Sennaar's plain. O Niobe! in what a trance of woe Thee I beheld, upon that highway drawn, Sev'n sons on either side thee slain! Saul! How ghastly didst thou look! on thine own sword Expiring in Gilboa, from that hour Ne'er visited with rain from heav'n or dew!
For descriptive material go to Klonsky's page 156; he mentions Blake's Urizen and Vala:
A batch of swords surmounts the faces. The bearded king was said to be Saul; the Queen
sitting beside him is suggested to be Minerva, or else Urizen and Vala