Shapur Sewn into the Ass's Hide

From D8.1.4, Shapur Goes to Rum and Is Captured by Caesar. It illustrates D8.1.4.53–58:

D8.1.4.53
They took him to the women’s rooms and tiedHis hands; no strength can thrust his fate aside.
D8.1.4.54
What use are all the stars that sages read,When all their knowledge fails us in our need?
D8.1.4.55
They lit a candle by the drunken king,And sewed him in a donkey hide with string.
D8.1.4.56
All said, “The wretch has gained a donkey skin,And lost the throne his pride had wrapped him in.”
D8.1.4.57
They bore him to a narrow, darkened cell,A luckless captive, brought in haste to dwell.
D8.1.4.58
They flung him down upon that prison floor,Then fixed a lock upon the chamber door.