First they came for Hindraf,
I remained silent;
I was not a Hindu.

Then they locked up the bloggers,
I remained silent;
I was not a blogger.

Then they came for Perak,
I did not protest;
I was not a Perakian.

Then they came for Selangor,
I did not speak out;
I was not a Selangorian.

When they came for me,
there was no one left to speak out for me. (less info)