Valmiki Ramayana Aranya Kanda Sarga 60 Shloka 15
Original Shlokaककुभः ककुभोरूं तां व्यक्तं जानाति मैथिलीम्। यथा पल्लवपुष्पाढ्यो भाति ह्येष वनस्पतिः।।3.60.15।।
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वनस्पतिः the tree, पल्लवपुष्पाढ्यः rich with tender leaves and flowers, यथा as, भाति appears, ककुभः kakubha, ककुभोरूम् lady with beautiful thighs, ताम् her, मैथिलीम् Maithili's, व्यक्तम् clearly, जानाति the tree knows.
This Kakubha tree rich with tender leaves and flowers (perhaps)knows Maithili whose thighs are beautiful like the trunk of the Kakubha tree.