Ramayana
तत्रेषूपलयन्त्राणिबलवन्तिमहान्तिच । आगतंपरसैन्यंतैस्तत्रप्रतिनिवार्यते ॥ ६-३-१२
"The doors are fitted with powerful machines which retaliate by discharging darts and stones on the enemy's army and kill them. ॥ 6-3-12॥
english translation
tatreSUpalayantrANibalavantimahAntica । AgataMparasainyaMtaistatrapratinivAryate ॥ 6-3-12
hk transliteration by Sanscript