Ramayana
अभिज्ञानं कुरुष्व त्वमात्मनो वानरेश्वर । येन त्वामभिजानीयां द्वन्द्वयुद्धमुपागतम् ॥ ४-१२-३८
'O lord of monkeys while you both are engaged in a duel wear some identification mark by which I can recognise you. ॥ 4-12-38॥
english translation
abhijJAnaM kuruSva tvamAtmano vAnarezvara । yena tvAmabhijAnIyAM dvandvayuddhamupAgatam ॥ 4-12-38
hk transliteration by Sanscript