I read this from the book Oxford Grammar that the preposotion before doesn't normally come at the end.
Example:
There's a meeting at twelve, before which we need to talk to Lonnie. (NOT ... which we need to talk to Lonnie before)
The example above makes me think, what about the phrase that is usually used i.e. As I said before? Will it be grammatically correct should it be written as Before which as I said?