John 7:53-8:11. This story gives a flesh-and-blood example of what it means for Jesus to be the source of life and the source of light.  He frees this woman from condemnation, but also shines His light on her, freeing her from her life of sin.

Sermon Audio.

Textual Issues: (meaning, issues with the text itself, not the story) “Jesus and the woman taken in adultery: Textual History” on Wikipedia, Pictures of Manuscripts on Wikipedia (also, you can dig around on the Center for the Study of New Testament Manuscripts site too), John McArthur’s sermon on this (note his introduction), and Mark Driscoll’s sermon intro addresses this too (audio only).