The lion and the lamb - biblical ME

As a Christian, this one is seriously messing with me.

I went to a private Christian school most of my school years. I had to take apologetics from 6th grade on. I had to memorize most of the Bible. I lived in a very Christian world, constantly engrossed by biblical verses, prayer, philosophical discussions and the like. The allegory/Bible verses/symbolism was never “the wolf and the lamb” - NEVER. It was always the lion and the lamb.

This is by far the most shocking ME I’ve ever heard of since I started hearing about them years ago. This is something I KNOW without a shadow of a doubt was different.