Zarvan Trembles in the Royal Tent

From E1.2, Anooshirvan Avenges Mahbud. It illustrates E1.2.27–34:

E1.2.27
At stage’s end he halted by a stream,And pitched his royal camp beside its gleam.
E1.2.28
When old Zarvan arrived within the tent,All strangers from the private space were sent.
E1.2.29
The Shah spoke next of magic’s hidden skill,And how a glance at milk could work such ill.
E1.2.30
“This tale intrigues me,” said the Shah, and thenAsked how death came to Mahbud’s two young men.
E1.2.31
Zarvan stood trembling, overcome with dread;The Shah perceived his guilt at once and said:
E1.2.32
“Tell me the truth; conceal no part through lies,Nor cloak your crime beneath a false disguise.
E1.2.33
For knavery gives birth to evil deeds,And evil fellowship corrupts good seeds.”
E1.2.34
Zarvan confessed the secret from the start,But blamed the Jew for every wicked part.