أَشْـهَدُ أَنْ لاَ إِلَـهَ إِلاَّ اللَّــهُ وَحْـدَهُ لَا شَرِيـكَ لَـهُ
وَأَشْهَدُ أَنَّ مُحَمَّـداً عَبْــدُهُ وَرَسُـوْلُـه
Ashhadu an lā ilāha illallāhu waḥdahu lā sharīka lah, wa ashhadu anna Muḥammadan ʿabduhu wa rasūluh.
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
Upon completing ablution (wudu).
Source / Reference
Hisnul Muslim 13