Lions Chained Beside the Ivory Throne

From D9.12, Bahram Goor Claims His Right to Rule. It illustrates D9.12.127–131:

D9.12.127
They gave the Mobad crown and throne to keep;Bahram left town and crossed the plain’s broad sweep.
D9.12.128
Brave Gostaham had two fierce lions chained;He gave them to the Mobad, thus restrained.
D9.12.129
They dragged the fighting lions, wild and grim;With fear the handlers’ senses all grew dim.
D9.12.130
At the throne’s feet they chained the lions down;Upon its ivory corner lay the crown.
D9.12.131
All eyes were fixed on crown and ivory chair,To see how Bahram in the test would fare.