Mahabharata Udyoga Parva Chapter 147:2

Mahabharata Udyoga Parva (Bhagwat Yana Parva) Chapter 147:2 How, in consequence of that promise I could not be king and have drawn up my vital seed, are, of course, well-known to thee. (I do not grieve for that). Observing that vow of mine, behold, I am living in happiness and joy. In her, O king, was born my younger brother, that mighty-armed and handsome supporter of Kuru's race, viz., Vichitravirya of virtuous soul. After my father's ascension to heaven, I installed Vichitravirya as a ruler of the kingdom, that was mine, while I placed myself under him as a servant of his. O king of kings, I then brought him suitable wives, having vanquished many assembled monarchs. Thou hast heard of it often. Sometime after, I was engaged in a single combat with the (great) Rama. From fear of Rama, my brother fled, the more so as his subject deserted him. During this period, he became very much attached to his wives and accordingly had an attack of phthisis. Upon his death, there was anarchy in the kingdom and the chief of the gods poured not a drop of rain (on the realm). The subjects then, afflicted by fear of hunger, hastened to me and said, 'Thy subjects are on the point of being exterminated. Be thou our king for the sake of our good. Dispel this drought. Blessed be thou, O perpetuator of Santanu's race. Thy subjects are being greatly afflicted by severe and frightful maladies. Very few of them are still alive. It behoveth thee, O son of Ganga, to save them. Dispel these tortures. O hero, cherish thy subjects righteously. When thou art alive, let not the kingdom go to destruction.' Hearing these words of theirs uttered in a weeping voice, my heart was undisturbed. Remembering the behaviour of good, I desired to maintain my vow. Then, O king, the citizens, my auspicious mother Kali herself, our servants, the priests and the preceptors (of our house), and many Brahmanas of great learning, all afflicted with great woe, solicited me to occupy the throne. And they said, 'When thou art alive, shall the kingdom, ruled by Pratipa (of old), go to ruin? O thou of magnanimous heart, be thou the king for our good.