Valmiki Ramayana Ayodhya Kanda Sarga 37 Shloka 31
Original Shlokaयद्यपि त्वं क्षितितलाद्गगनं चोत्पतिष्यसि। पितृर्वंशचरित्रज्ञः सोऽन्यथा न करिष्यति।।2.37.31।।
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त्वम् you, क्षितितलात् from the earth, गगनम् to the sky, उत्पतिष्यसि यद्यपि even if you can fly, पितुर्वंशचरित्रज्ञः knower of traditions of his father's dynasty, सः Bharata, अन्यथा otherwise, न करिष्यति will not act.
Even if you were to fly from earth to sky, Bharata who knows the traditions of his father's dynasty, will not act otherwise.