Little is known about Kubrat's activities. It is considered that Onogur Bulgars remained the only steppe tribes in good relations with the Byzantines. His date of death is placed between 650 and 663 AD. According to Nikephoros I, Kubrat instructed his five sons to "never separate their place of dwelling from one another, so that by being in concordance with one another, their power might thrive".
Little is known about Kubrat's activities. It is considered that Onogur Bulgars remained the only steppe tribes in good relations with the Byzantines. His date of death is placed between 650 and 663 AD According to Nikephoros I, Kubrat instructed his five sons to "never separate their place of dwelling from one another so that by being in concordance with one another, their power might thrive"