Shloka 5.1.109
समुद्रलङ्घनारम्भः — Commencement of the Ocean-Crossing
स तथा पातितस्तेन कपिना पर्वतोत्तमः।।।।बुद्ध्वा तस्य कपेर्वेगं जहर्ष च ननन्द च।
sa tathā pātitas tena kapinā parvatottamaḥ | buddhvā tasya kaper vegaṁ jaharṣa ca nananda ca ||
Thus struck down by the monkey, that excellent mountain—recognizing the monkey’s speed—rejoiced and exulted.
Felled by the vanara's speed, the tall mountain overwhelmed with joy roared in high pitch.
Honoring excellence: virtue includes the ability to recognize and celebrate righteous strength used for a noble cause.
After being pressed down by Hanumān, the mountain understands Hanumān’s extraordinary momentum and becomes delighted rather than offended.
Muditā (joy in another’s excellence): the mountain’s appreciative delight at Hanumān’s capability and mission.