What Bible was he reading?

A news article on a "ghetto talent show" and watermelon eating contest that has sparked controversy had one line that particularly caught my attention.
"Watermelon, back in the days, was a good food for African Americans, according to the Bible, but at the same time, it had an attachment with slavery and bondage ties," the Rev. Carl Johnson said.
Really? I don't recall the bible ever mentioning "African Americans." In fact, the only mention of melons of any kind in the entire bible (I checked) is Numbers 11:5, which is talking about the Israelites being hungry and dissatisified with god while wandering in the desert. I won't deny the attachment of watermelon with slavery, but would like to point out that many communites, not just predominantly black ones, have watermelon eating contests. As for invoking the bible, for shame Rev. Carl Johnson, for shame.