Mahabharata 1.117.22

तथेमं बलिनां श्रेष्ठं तस्य राज्ञो महात्मनःमातरिश्वा ददौ पुत्रं भीमं नाम महाबलम्

tathemaṃ balināṃ śreṣṭhaṃ tasya rājño mahātmanaḥmātariśvā dadau putraṃ bhīmaṃ nāma mahābalam

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