Nīlakaṇṭha-nāmotpatti-kathana
Origin of the Epithet “Nīlakaṇṭha”
एकधा बहुधा देव लोकानां प्रभवाप्ययः / आदित्या वसवो रुद्रा मरुतश्च सहाश्विनः
ekadhā bahudhā deva lokānāṃ prabhavāpyayaḥ / ādityā vasavo rudrā marutaśca sahāśvinaḥ
O Deva, though One, You appear as many; from You arise and into You dissolve the worlds. Ādityas, Vasus, Rudras, Maruts, and the Aśvins—all are You.