Śukadeva Gosvāmī then said to Mahārāja Parīkṣit: O Viṣṇudatta, those who already know that the soul is separate from the body, who are liberated from the invincible knot in the heart, who are always engaged in welfare activities for all living entities and who never contemplate harming anyone are always protected by the Supreme Personality of Godhead, who carries His disc [the Sudarśana cakra] and acts as supreme time to kill the demons and protect His devotees. The devotees always take shelter at the lotus feet of the Lord. Therefore at all times, even if threatened by decapitation, they remain unagitated. For them, this is not at all wonderful.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
न वा एतद्विष्णुदत्त महदद्भुतं यदसम्भ्रमः स्वशिरश्च्छेदन आपतितेऽपि विमुक्तदेहाद्यात्मभाव- सुदृढहृदयग्रन्थीनां सर्वसत्त्वसुहृदात्मनां निर्वैराणां साक्षाद्भगवतानिमिषारिवरायुधेनाप्रमत्तेन तैस्तैर्भावैः परिरक्ष्यमाणानां तत्पादमूलमकुतश्चिद्भयमुपसृतानां भागवतपरमहंसानाम्
na vā etadviṣṇudatta mahadadbhutaṃ yadasambhramaḥ svaśiraścchedana āpatite'pi vimuktadehādyātmabhāva- sudṛḍhahṛdayagranthīnāṃ sarvasattvasuhṛdātmanāṃ nirvairāṇāṃ sākṣādbhagavatānimiṣārivarāyudhenāpramattena taistairbhāvaiḥ parirakṣyamāṇānāṃ tatpādamūlamakutaścidbhayamupasṛtānāṃ bhāgavataparamahaṃsānām
SB 5.9.20