At the moment of being swallowed by the earth, Devadatta uttered a stanza
in which he declared that he had no refuge other than the Buddha.
It is this last act of Devadatta's which the Buddha had in view when he agreed
to
ordain Devadatta. (http://www.palikanon.com/english/pali_names/d/devadatta.htm)
About Devadatta
http://en.wikipedia.org/wiki/Devadatta
http://www.palikanon.com/english/pali_names/d/devadatta.htm