Valmiki Ramayana Bala Kanda Sarga 43 Shloka 17

तत: then, देवर्षिगन्धर्वा: devarshis, gandharvas, यक्ष: yakshas, ते सिद्धगणा: those hosts of siddhas, तदा then, तथा in that way, गगनात् from the sky, गाम् the earth, गताम् reached, व्यलोकयन्त looked on with astonishment.

Then devarshis, gandharvas, yakshas and hosts of siddhas looked on with astonishment at Ganga falling from the sky and descending on the earth.