Valmiki Ramayana Yuddha Kanda Sarga 56 Shloka 20
Original Shlokaसोऽश्वकर्णंसमासाद्यरोषदर्पान्वितोहरिः । तूर्णमुत्पाटयामासमहागिरिमिवोच्छ्रितम् ।।6.56.20।।
1 source checked for this shloka
सः he, हरिः monkey, रोषदर्पान्वितः pride and anger, महागिरिमिव like a big mountain, उच्छ्रितम् collecting, अश्वकर्णम् Aswakarana tree, समासाद्य holding, तूर्णम् quickly, उत्पाटयामास uprooted.
He (Hanuman) filled with pride and anger quickly uprooted an Aswakarana tree as huge as a mountain and held it.