Skandapurana 16.13.34

16.13.34

yoginyastatra rakṣaṃti brāhmyādyā mātarastathā ..
māghekṛṣṇacaturdaśyāṃ rātrau mātṛgaṇānyajet ..
balipuṣpopahāraiśca tataḥ siddhirbhaviṣyati .. 34 ..

The yoginīs protect it there, as do the Mothers beginning with Brāhmī. / On the fourteenth day of the dark half of Māgha, at night, one should worship the groups of Mothers / with offerings, flowers, and presents; then perfection will arise.