Sumpah Pemuda or The Youth Pledge was a declaration made on 28 October 1928 by young Indonesian nationalists at a conference in the then-Dutch East Indies. They proclaimed three ideals, one motherland, one nation and one language.
The Pledge:
In Indonesian, with the original spelling, the pledge reads:
Pertama
Kami poetera dan poeteri Indonesia, mengakoe bertoempah darah jang satoe, tanah air Indonesia.
Kedoea
Kami poetera dan poeteri Indonesia, mengakoe berbangsa jang satoe, bangsa Indonesia.
Ketiga
Kami poetera dan poeteri Indonesia, mendjoendjoeng bahasa persatoean, bahasa Indonesia.
In English:
Firstly
We the sons and daughters of Indonesia, acknowledge one motherland, Indonesia.
Secondly
We the sons and daughters of Indonesia, acknowledge one nation, the nation of Indonesia.
Thirdly
We the sons and daughters of Indonesia, respect the language of unity, Indonesian.
Selamat Hari Sumpah Pemuda! Salam Mahasiswa!
Source: http://en.wikipedia.org