Mudgalapurana 8.8.15

8.8.15

tvayā preritenātha tenaiva sṛṣṭaṃ caturṇāṃ pramūlaṃ mahadbindurūpam |
sadā sāhajenaiva yogena tatstho namo dhūmravarṇāya sarveśvarāya ||

Then, impelled by you, by that very [entity] was created the prime root of the four, having the form of the great drop (mahad-bindu); / ever residing therein by spontaneous yoga, homage to Dhūmravarṇa, the Lord of all!