Manusmriti

siva.sh/manusmriti/7/71

सर्वेण तु प्रयत्नेन गिरिदुर्गं समाश्रयेत् । एषां हि बाहुगुण्येन गिरिदुर्गं विशिष्यते ॥ ७१ ॥

sanskrit

Let him make every effort to secure a hill-fort, for amongst all those (fortresses mentioned) a hill-fort is distinguished by many superior qualities.

english translation

sarveNa tu prayatnena giridurgaM samAzrayet | eSAM hi bAhuguNyena giridurgaM viziSyate || 71 ||

hk transliteration by Sanscript