Śrīmad-Bhāgavatam 3.12.10
SB 3.12.10
Open the full passageSanskrit
yad arodīḥ sura-śreṣṭha sodvega iva bālakaḥ tatas tvām abhidhāsyanti nāmnā rudra iti prajāḥ
Translation
Thereafter Brahmā said: O chief of the demigods, you shall be called by the name Rudra by all people because you have so anxiously cried.