The Yaksha rejoined,—‘This Bhimasena is dear unto thee, and this Arjuna also is one upon whom all of you depend! Why, then, O king dost thou, wish a step-brother to get up with his life! How canst thou, forsaking Bhima whose strength is equal to that of ten thousand elephants, wish Nakula to live? People said that this Bhima was dear to thee. From what motive then dost thou wish a step-brother to revive? Forsaking Arjuna the might of whose arm is worshipped by all the sons of Pandu, why dost thou wish Nakula to revive?’ Yudhishthira said,—‘If virtue is sacrificed, he that sacrificeth it, is himself lost. So virtue also cherisheth the cherisher. Therefore taking care that virtue by being sacrificed may not sacrifice us, I never forsake virtue. Abstention from injury is the highest virtue, and is, I ween, even higher than the highest object of attainment. I endeavour to practise that virtue. Therefore, let Nakula, O Yaksha, revive! Let men know that the king is always virtuous! I will never depart from my duty. Let Nakula, therefore, revive! My father had two wives, Kunti and Madri. Let both of them have children. This is what I wish. As Kunti is to me, so also is Madri. There is no difference between them in my eye. I desire to act equally towards my mothers. Therefore, let Nakula live?’

In plain words: The Yaksha asks why he picks Nakula, a step-brother, over the mighty Bhima or Arjuna. Yudhishthira says he will never give up goodness, that not harming others is the highest virtue, and that he wants both of his father's wives, Kunti and Madri, to have a living son, because he treats both mothers equally.