Mahabharata Drona Parva Chapter 109:3

Mahabharata Drona Parva (Jayadratha-Vadha Parva) Chapter 109:3 He who is always well-affected, he who is always obedient, I think, he should be appointed to a grave commission in times of distress. As Kesava is ever the refuge of the Pandavas even, so art thou, O thou of Vrishni's race, who art like Kesava in prowess. I will, therefore, lay a burthen on thee. It behoveth thee not to frustrate my purpose. Arjuna is thy brother, friend, and preceptor, O bull among men, in this battle render him aid in time of distress. Thou art devoted to truth. Thou art a hero. Thou art the dispeller of the fears of friends. Thou art celebrated in the world, in consequence of thy acts, O hero, as one that is truthful in speech. He, O grandson of Sini, who casteth away his body while fighting in battle for friends, is equal to him who giveth away to Brahmanas the whole earth. We have heard of various kings gone to heaven, having given away the whole of this earth unto Brahmanas with due rites. O thou of virtuous soul, I beg of thee, with joined hands, even this viz., that, O lord, attain thou the fruit of giving away (unto Brahmanas) the whole earth, or something higher than that by incurring danger to thy life itself for helping Arjuna. There is one, viz., Krishna, that dispeller of the fears of friends, who is ever willing to cast away his life in battle (for the sake of friends). Thou, O Satyaki, art the second. None but a hero can render aid unto a hero, exerting valorously in battle, from desire of fame. An ordinary person cannot do so. In this matter, here is none else but thee who can protect Arjuna. On one occasion, while applauding thy numerous feats, Arjuna, giving me great pleasure repeatedly recited them. He said of thee that thou art endued with extreme lightness of hand, that thou art conversant with all modes of warfare, that thou art possessed of great activity and great prowess. He said, 'Satyaki is endued with great wisdom, is acquainted with every weapon, is a hero, and is never stupefied in battle. Of broad neck and broad chest, of mighty arms and broad cheeks, or great strength and great prowess, Satyaki is a high-souled Maharatha. He is my disciple and friend; I am dear to him and he is dear to me. Becoming my ally, Yuyudhana will crush the Kauravas. Even if Kesava and Rama, and Aniruddha, and the mighty car-warrior Pradyumna, and Gada, and Sarana, and Samva, with all the Vrishnis, case themselves in mail for assisting us, O king, in the field of battle, I shall yet appoint that tiger among men viz., Satyaki of unbaffled prowess, for our aid, since there is none equal to him.' Even this is what Dhananjaya told me in the Dwaita woods, in thy absence, while truly describing thy merits in an assembly of righteous persons. It behoveth thee not, O thou of the Vrishni race, to falsify that expectation of Dhananjaya, and also of myself and Bhima!