Mahabharata 2.21.22

2.21.22

evamuktaḥ sa kṛṣṇena pāṇḍavaḥ paravīrahā |
jarāsaṃdhasya tadrandhraṃ jñātvā cakre matiṃ vadhe || 22 ||

It was on the night of the fourteenth of the lunar fortnight that the monarch of Magadha desisted from fatigue. And O king, Janardana beholding the monarch tired, addressed Bhima of terrible deeds, and as if to stimulate him said,--'O son of Kunti, a foe that is fatigued cannot be pressed for if pressed at such a time he may even die. Therefore, O son of Kunti, this king should not be oppressed by thee. On the other hand, O bull of the Bharata race, fight with him With thy arms, putting forth as much strength only as thy antagonist hath now left!' Then that slayer of hostile heroes, the son of Pandu, thus addressed by Krishna, understood the plight of Jarasandha and forthwith resolved upon taking his life. And that foremost of all men endued with strength, that prince of the Kuru race, desirous of vanquishing the hitherto unvanquished Jarasandha, mustered all his strength and courage."