Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 20
Sanskrit:
तन्माता कोटरा नाम नग्ना मक्तशिरोरुहा ।पुरोऽवतस्थे कृष्णस्य पुत्रप्राणरिरक्षया ॥ २० ॥
ITRANS:
tan-mātā koṭarā nāmanagnā makta-śiroruhāpuro ’vatasthe kṛṣṇasyaputra-prāṇa-rirakṣayā
Translation:
Just then Bāṇāsura’s mother, Koṭarā, desiring to save her son’s life, appeared before Lord Kṛṣṇa naked and with her hair undone.