Valmiki Ramayana Kishkindha Kanda Sarga 39 Shloka 34
Original Shlokaततो यूथपतिर्वीरो दुर्मुखो नाम वानरः। प्रत्यदृश्यत कोटीभ्यां द्वाभ्यां परिवृतो बली।।4.39.34।।
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ततः thereafter, यूथपतिः leader of the troop, वीरः hero, बली strong one, दुर्मुखो नाम Durmukha by name, वानरः vanara, द्वाभ्याम् with two, कोटीभ्याम् with crores, परिवृतः surrounded, प्रत्यदृश्यत appeared.
Thereafter the mighty hero, leader of the troop, by name Durmukha appeared with two crore vanaras.