Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 31
Sanskrit:
दृष्ट्वा निस्तेजसं कामं सगणं भगवान् स्वराट् ।श्रुत्वानुभावं ब्रह्मर्षेर्विस्मयं समगात् परम् ॥ ३१ ॥
ITRANS:
dṛṣṭvā nistejasaṁ kāmaṁsa-gaṇaṁ bhagavān svarāṭśrutvānubhāvaṁ brahmarṣervismayaṁ samagāt param
Translation:
The mighty King Indra was most astonished when he heard of the mystic prowess of the exalted sage Mārkaṇḍeya and saw how Cupid and his associates had become powerless in his presence.