أَشْهَدُ أَنْ لا إِلَهَ إِلاّ اللهُ وَحْدَهُ لا شَريـكَ لَهُ وَأَشْهَدُ أَنَّ مُحَمَّداً عَبْدُهُ وَرَسولُه
Ashhadu an la ilaha illal-lahu wahdahu la shareeka lah, wa-ashhadu anna Muhammadan AAabduhu warasooluh
Translation
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.
When to recite
Recited after completing ablution.
Source / Reference
Muslim 1/209