The appointment of Badi al-Zaman as the ruler of Balkh after the Battle of Hissar, and at the same time the execution of Mumin Mirza, showed that there will inevitably be bloody clashes between father and son. The article analyzes the letter of A. Navoi to Badi al-Zaman and describes their meeting to convince him to make peace with his father, in order to mitigate this situation. It is also narrated that the tricks and deceit of provocateurs in the palace, despite these efforts, led to the beginning of bloody clashes and the collapse of the country.