ENOfficial
Wa 'anā 'ash-hadu 'an lā 'ilāha 'illallāhu waḥdahu lā sharīka lahu wa 'anna Muḥammadan 'abduhu wa rasūluhu, raḍītu billāhi rabban, wa bi Muḥammadin rasūlan wa bi 'l-islāmi dīnan. I bear witness that none has the right to be worshipped but Allah alone, Who has no partner, and that Muhammad is His slave and His Messenger. I am pleased with Allah as my Lord, with Muhammad as my Messenger and with Islam as my religion.1 2 Reference: 1. Muslim 1/290. 2. Ibn Khuzaymah 1/220.
Source: sunnah.com
Other translations
Arabic
وَأَنا أَشْـهَدُ أَنْ لا إِلـهَ إِلاّ اللهُ وَحْـدَهُ لا شَـريكَ لَـه ، وَأَنَّ محَمّـداً عَبْـدُهُ وَرَسـولُه، رَضيـتُ بِاللهِ رَبَّاً ، وَبِمُحَمَّـدٍ رَسـولاً وَبِالإِسْلامِ دينَـاً
sunnah.com