Name the Book and Author, My Style

My husband, nards656, has been having a "Name the Preacher/Writer" thing over at His Blog.

Now, I got one of them right, but only because I guessed correctly.

The problem is, he seems to read stuff a bit different than I do.

So, in honor of him, and as a direct copy, I chose one of the pieces of literature that I am more familiar with, and will ask you --

Who is the author, and from what book, does this line come?

Jammy to the left. Jammy to the right.

Jammy, jammy, jammy, jammy, PJ!