Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 26

Sanskrit:

युवां तुल्यबलौ वीरौ हे राजन् हे वृकोदर ।एकं प्राणाधिकं मन्ये उतैकं शिक्षयाधिकम् ॥ २६ ॥

ITRANS:

yuvāṁ tulya-balau vīrauhe rājan he vṛkodaraekaṁ prāṇādhikaṁ manyeutaikaṁ śikṣayādhikam

Translation:

[Lord Balarāma said:] King Duryodhana! And Bhīma! Listen! You two warriors are equal in fighting prowess. I know that one of you has greater physical power, while the other is better trained in technique.

Purport:

Bhīma was physically more powerful, but Duryodhana was more advanced in terms of technique.