What is the full text of a poem written by a foreigner who tolerates cowardice and is bullied by others and nobody helps him?

I didn't speak-because I'm not a producer;

Then they chased the Jews,

I didn't speak-because I'm not Jewish;

Later, they went after union members,

I didn't speak-because I'm not a union member;

After that, they went after Catholics,

I didn't speak-because I am a Protestant;

Finally, they came to me,

But no one supports me anymore.

Author: Martin Niemoller