The Nāṣirī Generations 286.1.8

286.1.8

and, under the supposition that the kuriltae would not, and could not, be held without them, they proceeded very leisurely. It so happened, however, that Barka Khan had previously written to his brother, Batu, saying, that it was now two years since the sons of Uktae, Kyuk, and Chaghatae had been summoned to attend, and they would not, and were constantly occupied in their ambitious and seditious designs. In reply, Batu gave orders, saying: “Place ye Mangu on the throne, and, if they or either of them do anything contrary to the yasa of the Chingiz Khan, let their heads pay the forfeit.”