Markandeya Purana 2.41

2.41

hate ca tasmin nṛpatau bhagadatte nareśvare /
bahūnyahānyabhūdyuddhaṃ kurupāṇḍavasainyayoḥ //

And after king Bhagadatta, ruler of men, was slain, the fight between the armies of the Kurus and Pāṇḍavas went on many days. At the end of the battle, when Dharma’s son Yudhiṣṭhira approached the son of Śāntanu to hear the high-souled Bhīṣma proclaiming the entire laws, a sage named Śamīka came to the spot where, O best of dvijas, lay the eggs within the bell. There he heard the voice of the little birds chirping, whose voices were inarticulate on account of their infancy, although they had transcendant knowledge. Then the Ṛṣi, accompanied by his disciples, lifted up the bell and saw with surprise the young motherless and fatherless birds. The venerable Muni Śamīka, having so seen them on the ground there, filled with astonishment, addressed his attendant dvijas.