Who was Buddha's teacher?

[Jishin]

Alan Watts tells a story about himself during his lectures on eastern philosophy that goes something like this: He has a good friend who is a Zen master and his friend asks Alan Watts as to why not become his student? Alan Watts replies with 'who was Buddha's teacher?' The Zen master then gives Mr. Watts a strange look, smiles and gives him a clover leaf.

I am not Alan Watts.

I need to continue my daily Zazen and readings.