I mean, I’m used to the Wikipedia entries on Buddhism being subpar, but my goodness. Under “content”, all it says is:
In Majjhima Nikaya, Buddha shares his experience:
“Thus far, SariPutta, did I go in my penance? I went without clothes. I licked my food from my hands. I took no food that was brought or meant especially for me. I accepted no invitation to a meal.”
These are in conformity with the conduct of a Digambara monk. Ultimately, the Buddha abandoned reliance upon these methods on his discovery of a Middle Way.
That’s it. That’s the only thing Wikipedia has to say about the content of the Majjhima Nikaya.
And the links to the Chalmers translation send you to either Horner’s translation of the Vinaya, or the original Pali text. The early Buddhist entries on Wikipedia are such a gomayakkhandha.