Mahabharata 5.37.48
बलं पञ्चविधं नित्यं पुरुषाणां निबोध मेयत्तु बाहुबलं नाम कनिष्ठं बलमुच्यते
balaṃ pañcavidhaṃ nityaṃ puruṣāṇāṃ nibodha meyattu bāhubalaṃ nāma kaniṣṭhaṃ balamucyate
Our plain-language meaning of this verse is waiting for scholar review.