Valmiki Ramayana Sundara Kanda Sarga 1 Shloka 160
Original Shlokaएवमुक्तः सुरसया क्रुद्धो वानरपुङ्गवः।।5.1.160।। अब्रवीत्कुरु वै वक्त्रं येन मां विषहिष्यसे।
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सुरसया by Surasa, एवम् in that way, उक्तः having been spoken to, वानरपुङ्गवः supreme vanara, क्रुद्धः got angry, अब्रवीत् he said, वक्त्रम् mouth, कुरु वै open, येन in such a way, माम् me, विषहिष्यसे you can bear me.
Thus addressed by Surasa, Hanuman the supreme vanara said, "Open your mouth wide enough to hold me."