[Buddha-l] Ven Maha Kassapa and the flower

[jkirk]

There's a story I read somewhere (might be in one of Thich Nhat Hanh's 
books) of someone asking the Buddha a question. The Buddha plucks a flower 
and holds it up. Mahakassapa smiles, and the Buddha says words to the effect 
that MK understood the point. I've probably garbled this. But I can't find 
this story in accesstoinsight.org in anything under Kassapa.
Can someone tell me if this story is part of the Mahayana literature or is 
in the Pali literature, and where to find it?
Thanks,
Joanna