Valmiki Ramayana Kishkindha Kanda Sarga 43 Shloka 32
Original Shlokaमयस्य भवनं यत्र दानवस्य स्वयं कृतम्।।4.43.31।। मैनाकस्तु विचेतव्य स्ससानुप्रस्थकन्दरः। स्त्रीणामश्वमुखीनां तु निकेतास्तत्र तत्र तु।।4.43.32।।
1 source checked for this shloka
यत्र there, दानवस्य demon's, मयस्य Maya's, स्वयं कृतम् built personally by him, भवनम् mansion, ससानुप्रस्थकन्दरः with table lands and deep caves, मैनाकः Mainaka, विचेतव्यः you may look, तत्र तत्र here and there, अश्वमुखीनां स्त्रीणाम् of kinnera women with horseface, निकेताः residences.
'There on Mainaka a demon, called Maya has built a mansion all by himself. Try to look in the plain lands, ridges and deep caves of Mainaka and in the residences of kinnera women with faces of horses.