Rasarnavasudhakara 2.287

2.287

śaktyā sahajotsāho, yathā-
atho mahendraṃ girim āruroha
vārāṃ nidhiṃ laṅghayituṃ hanūmān |
vāmetarākṣi-sphuraṇena jāna
kara-sthitāṃ rāghava-kārya-siddhim ||

Innate energy through power, as in:
Then Hanūmān ascended Mount Mahendra
to cross the ocean,
knowing from the throbbing of his right eye
that the success of Rāghava's task was already in his hand.