Mahabharata 13.33.15

नैते देवैर्न पितृभिर्न गन्धर्वैर्न राक्षसैःनासुरैर्न पिशाचैश्च शक्या जेतुं द्विजातयः

naite devairna pitṛbhirna gandharvairna rākṣasaiḥnāsurairna piśācaiśca śakyā jetuṃ dvijātayaḥ

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