Brahmanda Purana 3.31.93

Brahmāṇḍapurāṇa 3.31.93

mantriṇī kṛtasānnidhyā vṛṇīṣva varamityaśāt /
so 'pisarvamuniśreṣṭho mātaṅgastapasāṃ nidhiḥ /
uvāca tāṃ puro dattasānnidhyāṃ śyāmalāṃbikām //