Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 15
Sanskrit:
एतत् पुरन्दरो ज्ञात्वा सप्तमेऽस्मिन् किलान्तरे ।तपोविशङ्कितो ब्रह्मन्नारेभे तद्विघातनम् ॥ १५ ॥
ITRANS:
etat purandaro jñātvāsaptame ’smin kilāntaretapo-viśaṅkito brahmannārebhe tad-vighātanam
Translation:
O brāhmaṇa, during the seventh reign of Manu, the current age, Lord Indra came to know of Mārkaṇḍeya’s austerities and became fearful of his growing mystic potency. Thus he tried to impede the sage’s penance.