|Download zsh source|
You can either download the zsh source from one of the mirrors or from Sourceforge.
Download zsh 5.1.1 from Sourceforge (-doc contains the documentation/man pages):
As xzed tar archive: zsh-5.1.1.tar.xz (2.8MiB), zsh-5.1.1-doc.tar.xz (3.1MiB)
As gzipped tar archive: zsh-5.1.1.tar.gz (4.2MiB), zsh-5.1.1-doc.tar.gz (3.6MiB)Older releases can be downloaded from the zsh downloads on Sourceforge.