Rasendrapurana 46.210

Rasendrapurāṇa 46.210

uttamanīlalakṣaṇam
ekacchāyaṃ guru snigdhaṃ svacchaṃ piṇḍitavigraham
mṛdumadhye lasajjyotiḥ saptadhā nīlamuttamam