Original sentence: According to an opinion of some scholars in Patanjali's time identification of Krishna with Vasudeva is an established fact as is surmised from a passage of the Mahabhasya - (jaghana kamsam kila vasudevah).Not just indian Gupta period but also some historical records of the Greeks show existence of the bhakti tradition to Krishna-Vaasudeva, it needs to be noted hat, even Panini gives some evidence to the ancient root of Krishna-Vaasudeva bhakti,its is however only much later (2nd century BC) Patanjali who refer in his definition of the devotee or bhakta as "the follower of Vasudeva, God of gods.This "supposed earliest phase is though to have been established from the sixth to the fifth centuries BCE at the time of Panini, who in his Astadhyayi explained the word vasudevaka as a bhakta, devotee, of Vasudeva and its believed that Bhagavata religion with the worship od Vasudeva Krishna were at the root of the Vaishnavism in Indian history
Edited sentence: In Patanjali's time identification of Krishna with Vasudeva is an established.Its is however only later (2nd century BC) Patanjali who refer in his definition of the devotee or bhakta as "the follower of Vasudeva, God of gods.Not just historical records of the Greeks show existence of the bhakti tradition to Krishna-Vaasudeva,.This supposed earliest phase is though to have been established from the sixth to the fifth centuries BCE at the time of Panini, who in his Astadhyayi explained the word vasudevaka as a bhakta, devotee, of Vasudeva and its believed that Bhagavata religion with the worship od Vasudeva Krishna were at the root of the Vaishnavism in Indian history.besides that, even the Panini will give some evidence to the ancient root of Krishna-Vaasudeva bhakti, since he quotes on bhakti to Vaasudeva from Arjunas example.fact as is surmised from a passage of the Mahabhasya - (jaghana kamsam kila vasudevah)