One verse

Srimad Bhagavatam 8.15.14

8.15.14

आकाशगङ्गया देव्या वृतां परिखभूतया । प्राकारेणाग्निवर्णेन साट्टालेनोन्नतेन च ॥ १४ ॥

akasa-gangaya devya vrtam parikha-bhutaya prakarenagni-varnena sattalenonnatena ca

akasa-gangaya
by Ganges water known as Akasa-ganga
devya
the always-worshipable goddess
vrtam
surrounded
parikha-bhutaya
as a trench
prakarena
by ramparts
agni-varnena
resembling fire
sa-attalena
with places for fighting
unnatena
very high
ca
and.

The city was surrounded by trenches full of Ganges water, known as Akasa-ganga, and by a high wall, which was the color of fire. Upon this wall were parapets for fighting.