Mahabharata 9.60.21

नैष योग्योऽद्य मित्रं वा शत्रुर्वा पुरुषाधमःकिमनेनातिनुन्नेन वाग्भिः काष्ठसधर्मणा

naiṣa yogyo'dya mitraṃ vā śatrurvā puruṣādhamaḥkimanenātinunnena vāgbhiḥ kāṣṭhasadharmaṇā

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