यथा दुर्गाश्रितानेतान्नोपहिंसन्ति शत्रवः । तथाऽरयो न हिंसन्ति नृपं दुर्गसमाश्रितम् ॥ ७३ ॥
As enemies do not hurt these (beings, when they are) sheltered by (their) fortresses, even so foes (can) not injure a king who has taken refuge in his fort.
english translation