Valmiki Ramayana Aranya Kanda Sarga 32 Shloka 6
Original Shlokaदेवगन्धर्वभूतानामृषीणां च महात्मनाम्। अजेयं समरे शूरं व्यात्ताननमिवान्तकम्।।3.32.6।।
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देवगन्धर्वभूतानाम् of gods, gandharvas, all living beings, महात्मनाम् of great sages, ऋषीणां च and seers, समरे in war, अजेयम् invincible, शूरम् warrior, व्यात्ताननम् wide open jaws, अन्तकम् इव like Yama, lord of death.
Invincible to gods, gandharvas, all living beings, great sages and seers, he was like Yama, lord of death with wide open jaws.