Kavad shortly proceeded to have all his brothers and half-brothers executed, including the heir Mardanshah, who was Khosrow's favourite son. The murder of all his brothers, "all well-educated, valiant, and chivalrous men", stripped the Sasanian dynasty of a future competent ruler, and has been described as a "mad rampage" and "reckless". Three days later he ordered Mihr Hormozd to execute Khosrow. However, after the regicide of his father, Kavad also proceeded to have Mihr Hormozd killed. Khosrow's daughters Boran and Azarmidokht reportedly criticized and scolded Kavad for his barbaric actions, which made him filled with remorse. With the support of the Iranian nobles, Kavad then made peace with the Byzantine emperor Heraclius, which made the Byzantines regain all their lost territories, their captured soldiers, a war indemnity, along with the True Cross and other relics that were lost in Jerusalem in 614.