Mbh 8.90.2f

Then Dhananjaya, filled with rage, inspiring with mantras another celestial weapon that looked like fire and that resembled the poison of the snake and that was as hard as the essence of adamant, and uniting the Raudra weapon with it, became desirous of shooting it at his foe. At that time, O king, the earth swallowed up one of wheels of Karna's car. Quickly alighting then from his vehicle, he seized his sunken wheel with his two arms and endeavoured to lift it up with a great effort. Drawn up with force by Karna, the earth, which had swallowed up his wheel, rose up to a height of four fingers' breadth, with her seven islands and her hills and waters and forests. Seeing his wheel swallowed, the son of Radha shed tears from wrath, and beholding Arjuna, filled with rage he said these words, "O Partha, O Partha, wait for a moment, that is, till I lift this sunken wheel. Beholding, O Partha, the left wheel of my car swallowed through accident by the earth, abandon (instead of cherishing) this purpose (of striking and slaying me) that is capable of being harboured by only a coward. Brave warriors that are observant of the practices of the righteous, never shoot their weapons at persons with dishevelled hair, or at those that have turned their faces from battle, or at a Brahmana, or at him who joins his palms, or at him who yields himself up or beggeth for quarter or at one who has put up his weapon, or at one whose arrows are exhausted, or at one whose armour is displaced, or at one whose weapon has fallen off or been broken! Thou art the bravest of men in the world. Thou art also of righteous behaviour, O son of Pandu! Thou art well-acquainted with the rules of battle. For these reasons, excuse me for a moment, that is, till I extricate my wheel, O Dhananjaya, from the earth. Thyself staying on thy car and myself standing weak and languid on the earth, it behoveth thee not to slay me now. Neither Vasudeva, nor thou, O son of Pandu, inspirest me with the slightest fear.