People used to say things like "god's speed". It has died out as the reference became outdated. I assume all religious language will die out sometime after religion dies out (if religion will indeed die out).
I have studied the Bible and the theology behind Christianity for many years. I have been to many churches. I have walked the depth and the breadth of the religion and, as a result of this, I have a lot of bullshit to scrape off the bottom of my shoes. ~Ziploc Surprise