Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 1-2

Sanskrit:

श्रीशुक उवाचकेशी तु कंसप्रहित: खुरैर्महींमहाहयो निर्जरयन् मनोजव: ।सटावधूताभ्रविमानसङ्कुलंकुर्वन् नभो हेषितभीषिताखिल: ॥ १ ॥तं त्रासयन्तं भगवान् स्वगोकुलंतद्धेषितैर्वालविघूर्णिताम्बुदम् ।आत्मानमाजौ मृगयन्तमग्रणी-रुपाह्वयत् स व्यनदन्मृगेन्द्रवत् ॥ २ ॥

ITRANS:

śrī-śuka uvācakeśī tu kaṁsa-prahitaḥ khurair mahīṁmahā-hayo nirjarayan mano-javaḥsaṭāvadhūtābhra-vimāna-saṅkulaṁkurvan nabho heṣita-bhīṣitākhilaḥ

Translation:

Śukadeva Gosvāmī said: The demon Keśī, sent by Kaṁsa, appeared in Vraja as a great horse. Running with the speed of the mind, he tore up the earth with his hooves. The hairs of his mane scattered the clouds and the demigods’ airplanes throughout the sky, and he terrified everyone present with his loud neighing.

Purport:

When the Supreme Personality of Godhead saw how the demon was frightening His village of Gokula by neighing terribly and shaking the clouds with his tail, the Lord came forward to meet him. Keśī was searching for Kṛṣṇa to fight, so when the Lord stood before him and challenged him to approach, the horse responded by roaring like a lion.