One verse

Srimad Bhagavatam 12.8.15

12.8.15

एतत् पुरन्दरो ज्ञात्वा सप्तमेऽस्मिन् किलान्तरे । तपोविशङ्कितो ब्रह्मन्नारेभे तद्विघातनम् ॥ १५ ॥

etat purandaro jñātvā saptame ’smin kilāntare tapo-viśaṅkito brahmann ārebhe tad-vighātanam

etat
this
purandaraḥ
Lord Indra
jñātvā
learning
saptame
in the seventh
asmin
this
kila
indeed
antare
reign of Manu
tapaḥ
of the austerities
viśaṅkitaḥ
becoming fearful
brahman
O brāhmaṇa Śaunaka
ārebhe
he set into motion
tat
of that austerity
vighātanam
obstruction

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.