Mbh 15.2.2a

"Vaisampayana continued, 'Possessed of great energy, that perpetuator of Kuru's race, viz., the old king Dhritarashtra, could not notice any ill-will in Yudhishthira. Seeing that the high-souled Pandavas were in the observance of a wise and righteous conduct, king Dhritarashtra, the son of Amvika, became gratified with them. Suvala's daughter, Gandhari, casting off all sorrow for her (slain) children, began to show great affection for the Pandavas as if they were her own children. Endued with great energy, the Kuru king Yudhishthira, never did anything that was disagreeable to the royal son of Vichitraviryya. On the other hand, he always behaved towards him in a highly agreeable way. Whatever acts, grave or light, were directed by king Dhritarashtra, or the helpless Gandhari to be done, were all accomplished with reverence, O monarch, by that slayer of hostile heroes, viz., the Pandava king. The old king became highly gratified with such conduct of Yudhishthira. Indeed, he was grieved at the remembrance of his own wicked son. Rising every day at early dawn, he purified himself and went through his recitations, and then blessed the Pandavas by wishing them victory in battle. Making the usual gifts unto the Brahmanas and causing them to utter benedictions, and pouring libations on the sacred fire, the old king prayed for long life to the Pandavas. Indeed, the king had never derived that great happiness from his own sons which he always derived from the sons of Pandu. King Yudhishthira at that time became as agreeable to the Brahmanas as to the Kshatriyas, and the diverse bands of Vaisyas and Sudras of his realm. Whatever wrongs were done to him by the sons of Dhritarashtra, king Yudhishthira, forgot them all, and reverenced his uncle. If any man did anything that was not agreeable to the son of Amvika, he became thereby an object of hatred to the intelligent son of Kunti.