कुशीलवा वर्षारात्रमेकस्था वसेयुः ॥ कZ_०४.१.५८ ॥
kuśīlavā varṣārātramekasthā vaseyuḥ
कुशीलवा वर्षारात्रम् एकस्था वसेयुः।
To reduce untracked mobility (often linked to crime/espionage), simplify monitoring, and maintain order when travel and enforcement are harder in the monsoon.