Mbh 7.5.4

“‘Karna said, “All these foremost of men are high-souled persons. Every one of them deserveth to be our leader. There is no need of any minute examination. All of them are conversant with noble genealogies and with the art of smiting; all of them are endued with prowess and intelligence, all of them are attentive and acquainted with the scriptures, possessed of wisdom, and unretreating from battle.[8] All, however, cannot be leaders at the same time. Only one should be selected as leader, in whom are special merits. All of these regard one another as equals. If one amongst them, therefore, be honoured, others will be dissatisfied, and, it is evident, will no longer fight for thee from a desire of benefiting thee. This one, however, is the Preceptor (in arms) of all these warriors; is venerable in years, and worthy of respect. Therefore, Drona, this foremost of all wielders of weapons, should be made the leader. Who is there worthy of becoming a leader, when the invincible Drona, that foremost of persons conversant with Brahma, is here, that one who is equal to Sukra or Vrihaspati himself? Amongst all the kings in thy army, O Bharata, there is not a single warrior who will not follow Drona when the latter goeth to battle.[9] This Drona is the foremost of all leaders of forces, the foremost of all wielders of weapons, and the foremost of all intelligent persons. He is, besides, O king, thy preceptor (in arms). Therefore, O Duryodhana, make this one the leader of thy forces without delay, as the celestials made Kartikeya their leader in battle for vanquishing the Asuras.”’”