Valmiki Ramayana · Sundara Kanda · Sarga 1
दुष्करं निष्प्रतिद्वन्द्वं चिकीर्षन् कर्म वानरः। समुदग्रशिरोग्रीवो गवांपतिरिवाबभौ
duṣkaraṃ niṣpratidvandvaṃ cikīrṣan karma vānaraḥ| samudagraśirogrīvo gavāṃpatirivābabhau
Hanuman who raised his head and neck, intending to cross the formidable ocean which none else could accomplish, looked like a leading bull.
— M.N. Dutt (1891)
Commentary
Hanuman's physical transformation begins. The simile of the bull represents strength, virility and determination.
समुदग्रगवांपति