Mahabharata 12.271.67

वयं तु भृशमापन्ना रक्ताः कष्टमुखेऽसुखेकां गतिं प्रतिपत्स्यामो नीलां कृष्णाधमामथ

vayaṃ tu bhṛśamāpannā raktāḥ kaṣṭamukhe'sukhekāṃ gatiṃ pratipatsyāmo nīlāṃ kṛṣṇādhamāmatha

Our plain-language meaning of this verse is waiting for scholar review.