(أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ وَأَشْهَدُ أَنَّ مُحَمَّداً عَبْدُهُ وَرَسُولُهُ..).
Ashhadu an la ilaha illal-lahu wahdahu la shareeka lah, wa-ashhadu anna Muhammadan AAabduhu warasooluh.
I bear witness that none has the right to be worshipped except Allah, alone without partner, and I bear witness that Muhammad is His slave and Messenger.
Source
Hisn al-Muslim, no. 13