श्रीवत्सो नाम दक्षिणस्तनोर्द्ध्वे सूक्ष्मरोम्णां दक्षिणावर्त्तः श्रीभगवतोऽसाधारणलक्षणाम् ।
śrīvatso nāma dakṣiṇastanorddhve sūkṣma-romṇāṁ dakṣiṇāvarttaḥ śrī-bhagavato’sādhāraṇa-lakṣaṇām |
(Vaiṣṇava-toṣaṇī-ṭīkā on Śrīmad Bhāgavatam: 10.13.48)
“The lock of right-curling fine hair on the upper right breast known as Śrīvatsa is special characteristic of Śrī Bhagavān.”