Valmiki Ramayana Sundara Kanda Sarga 1 Shloka 57

सः that, महाकपिः great vanara, सोर्मिमालम् with its rising waves, महार्णवम् ocean, पिबन्निव as if gulping, बभौ looked, आकाशम् sky, च and , अपि also, पिपासुरिव as if thirsty, ददृशे looked.

While he was looking upward, that great vanara appeared as if, parched with thirst, he was gulping the entire ocean with its rising waves.