Living beings who are entangled in the complicated meshes of birth and death can be freed immediately by even unconsciously chanting the holy name of Kṛṣṇa, which is feared by fear personified.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
आपन्नः संसृतिं घोरां यन्नाम विवशो गृणन् । ततः सद्यो विमुच्येत यद्बिभेति स्वयं भयम्
āpannaḥ saṃsṛtiṃ ghorāṃ yannāma vivaśo gṛṇan | tataḥ sadyo vimucyeta yadbibheti svayaṃ bhayam
SB 1.1.14