The Lord also delivered the tiny ascetic sages called the Vālakhilyas when they fell into the water in a cow’s hoofprint and Indra was laughing at them. The Lord then saved Indra when Indra was covered by darkness due to the sinful reaction for killing Vṛtrāsura. When the wives of the demigods were trapped in the palace of the demons without any shelter, the Lord saved them. In His incarnation as Nṛsiṁha, the Lord killed Hiraṇyakaśipu, the king of demons, to free the saintly devotees from fear.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
संस्तुन्वतोऽब्धिपतितान् श्रमणानृषींश्च शक्रं च वृत्रवधतस्तमसि प्रविष्टम् । देवस्त्रियोऽसुरगृहे पिहिता अनाथा जघ्नेऽसुरेन्द्रमभयाय सतां नृसिंहे
saṃstunvato'bdhipatitān śramaṇānṛṣīṃśca śakraṃ ca vṛtravadhatastamasi praviṣṭam | devastriyo'suragṛhe pihitā anāthā jaghne'surendramabhayāya satāṃ nṛsiṃhe
SB 11.4.19