Rama and Krishna became the focus of a strong "bhakti" tradition, which found expression particularly in the "Bhagavata Purana". The Krishna tradition subsumed numerous Naga, yaksa and hill and tree-based cults. Siva absorbed local cults by the suffixing of "Isa" or "Isvara" to the name of the local deity, for example, Bhutesvara, Hatakesvara, Chandesvara. In 8th-century royal circles, the Buddha started to be replaced by Hindu gods in pujas. This also was the same period of time the Buddha was made into an avatar of Vishnu.