Code belongs in production.
I have had this as my mantra for as long as I've been developing software professionally. Tonight we released a new version of my product and so I tweeted it in celebration.
That got me to thinking: did I coin that phrase or did I read it somewhere? I often forget some clever tidbit that I've read, so it wouldn't have surprised me to find it in a Google search.
But there were no matches! I therefore claim its origin.