Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 24
Sanskrit:
ब्रह्माणं हर्षयामास हरिस्तांश्च द्विजोत्तमान् ।स्वगर्जितेन ककुभ: प्रतिस्वनयता विभु: ॥ २४ ॥
ITRANS:
brahmāṇaṁ harṣayām āsaharis tāṁś ca dvijottamānsva-garjitena kakubhaḥpratisvanayatā vibhuḥ
Translation:
The omnipotent Supreme Personality of Godhead enlivened Brahmā and the other highly elevated brāhmaṇas by again roaring with His uncommon voice, which echoed in all directions.
Purport:
Brahmā and other enlightened brāhmaṇas who know the Supreme Personality of Godhead are enlivened by the appearance of the Lord in any of His multi-incarnations. The appearance of the wonderful and gigantic incarnation of Viṣṇu as the mountainlike boar did not fill them with any kind of fear, although the Lord’s resounding voice was tumultuous and echoed horribly in all directions as an open threat to all demons who might challenge His omnipotency.