Valmiki Ramayana Yuddha Kanda Sarga 114 Shloka 78
Original Shlokaमारीचकुम्भकर्णाभ्यांवाक्यंममपितुस्तथा । न श्रुतंवीर्यमत्तेनतस्येदंफलमीदृशम् ।।6.114.78।।
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मारीचकुम्भकर्णाभ्याम् both Maricha, Kumbhakarna's, तथा both, मम my, पितुः father, वाक्यम् words of advice, वीर्यमत्तेन pride of valour, न श्रुतम् not listened, तस्य by that, ईदृशम् this kind, इदम् this, फलम् result
"You did not take the advice of both Maricha and Kumbhakarna. You have also not taken the advice of my father because of the pride of your valour. This kind of result is the consequence of that."