Devadatta - Greatest Enemy of Buddha

Devadatta, one of the disciples of Lord Buddha, is also the greatest enemy of Buddha. He made many attempts to kill Gautama Buddha. One of the attempt to kill Buddha was by sending an elephant which was drugged. But the elephant keep calm when Lord Buddha
Devadatta was a Buddhist monk and was a cousin as well as brother-in-law of Gautama Buddha and was the brother of Ananda, one of the close disciples of Buddha. According to Pali Tipitaka, Devadatta was the greatest enemy of Lord Buddha and was believed to have split the Sangha by persuading about 500 Buddhist monks who admired and followed him. Read more at:
https://www.originalbuddhas.com/blog/devadatta