Ah, yes, that is actually a mistake! :) Looking at the other examples on the same page spread, the "a.f." seems to be simply af. And the rest, as Christian pointed out, is a Bible verse, 2 Corinthians 5:1 (compare "Apoc. 14, 13", "Psal. 77, 2", "2 Tim. 1, 12", "Rom. 14, 7, 8" and "2 Tim. 3, 18" in the other examples, where the first is the Book of Revelations and the rest should be obvious from context).