Valmiki Ramayana Ayodhya Kanda Sarga 118 Shloka 11
Original Shlokaवरिष्ठा सर्वनारीणामेषा च दिवि देवता। रोहिणी न विनाचन्द्रं मुहूर्तमपि दृश्यते।।2.118.11।।
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सर्वनारीणाम् among all women, वरिष्ठा the very best, देवता goddess, एषा रोहिणी this Rohini, दिवि in the sky, चन्द्रं विना without the Moon, मुहूर्तमपि even for a moment, न दृश्यते is not seen.
Rohini, the very best among all women and the goddess of heaven, is never seen in the sky separated from the moon even for a moment.