Valmiki Ramayana Kishkindha Kanda Sarga 47 Shloka 6
Original Shlokaतदहः प्रथमं कृत्वा मासे प्रश्रवणं गताः। कपिराजेन सङ्गम्य निराशाः कपियूधपाः।।4.47.6।।
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तत् अहः that day, प्रथमम् first, कृत्वा having passed off, मासे in the month, कपियूधपाः monkey leaders, निराशाः disappointed, प्रस्रवणम् mountain Prasravana, गताः gone, कपिराजेन by the king of vanaras, सङ्गम्य after meeting.
The monkey leaders thus spent a month doing what they did daily and returning disappointed, met the monkey king on mount Prasravana.