Ramayana
त्रायन्तेसङ्क्रमास्तत्रपरसैन्यागतेसति । यन्त्रैस्तैरवकीर्यन्तेपरिखासुसमन्ततः ॥ ६-३-१७
"When the enemy arrives, the engines all over the moats lift the bridges making entry impossible for enemy armies. ॥ 6-3-17॥
english translation
trAyantesaGkramAstatraparasainyAgatesati । yantraistairavakIryanteparikhAsusamantataH ॥ 6-3-17
hk transliteration by Sanscript