Valmiki Ramayana 6.91.68
येन शक्रो महातेजा दानवानजयत् प्रभुः।पुरा दैवासुरे युद्धे वीर्यवान् हरिवाहनः॥
yena śakro mahātejā dānavānajayat prabhuḥ |purā daivāsure yuddhe vīryavān harivāhanaḥ ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book