hypothetically speaking.. how much oranges would it take to kill someone?

so, I have a bunch of oranges and I got nothin to do with them. like an ungodly ammount, I heard that if you feed someone enough bananas they'll like develope cancer or something so I thought.. "oranges kinda look like bananas" not that I wanna give someone cancer or kill someone.. but hypothetically speaking how much oranges would I need to accomplish such a feat? O' great femboys of knowledge, riddle me this.