Devibhagavatapurana 5.21.24

5.21.24

vyāsa uvāca |
tadākarṇya vacastasya suvimṛśya ca dānavau |
ūcatuḥ praṇipatyātha brahmāṇaṃ purataḥ sthitam ||

Vyâsa said:-- O King! Hearing thus the words of Brahmâ, the two Dânavas pondered over the matter and bowed down to the Prajâpati, the Lord of the Creation and said:-- O Merciful One! Grant us then so that we shall be invulnerable to any of the male of the Immortal Devas down to human beings and birds and deers; this is the boon that we ask. Where exists the woman so powerful as to kill us? We never fear any woman in all the three Lokas. O Lotus-born! We, the two brothers, want not to be killed by any male; the females are naturally weak therefore we need not fear them.