Mahabharata 13.80.31
सुरूपा बहुरूपाश्च विश्वरूपाश्च मातरःप्राजापत्या इति ब्रह्मञ्जपेन्नित्यं यतव्रतः
surūpā bahurūpāśca viśvarūpāśca mātaraḥprājāpatyā iti brahmañjapennityaṃ yatavrataḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book