Mahabharata 14.83.28

14.83.28

ityuktaḥ sa tathetyuktvā pūjayāmāsa taṃ hayam |
phalgunaṃ ca yudhāṃ śreṣṭhaṃ vidhivatsahadevajaḥ || 28 ||

Comforting him again, Arjuna once more said unto him, 'Thou shouldst repair to the Horse-sacrifice of our king which takes place at the coming full moon of Chaitra.' Thus addressed by him, the son of Sahadeva said, 'So be it,'--and then duly worshipped that horse as also Phalguna, that foremost of warriors. The sacrificial horse then, equipt with beautiful manes, proceeded at his will along the sea-coast, repairing to the countries of the Bangas, the Pundras, and the Kosalas. In those realms Dhananjaya, with his bow Gandiva, O king, vanquished innumerable Mlechecha armies one after another.'"