OK, that's IT!!! I can't stand it anymore with the stones!
Somebody else used that expression today as well, and though it's an admirable thought, full of forgiveness and understanding, it's been misquoted both times.
Which one is the first stone? Point to it on the ground.
It's "be the first to cast a stone". It's the person who's important here, not the stupid rock.
Sorry, Tom. I just had to get that off my chest. It's the hallmark of a bad translation of the Gospel According to John from its orginal Greek that has leaked into colloquial expression. It's like fingernails on a chalkboard to me.