Upon completing ablution (Wudu)
أَشْهَدُ أَنْ لا إِلهَ إِلاّ اللهُ وَحْدَه لاَ شَرِيْكَ لَهُ، وَأَشْهَدُ أَنّ مُحَمّدًا عَبْدُهُ وَرَسُولُهُ، اللّهُمّ اجْعَلْنِي مِنَ التّوّابِينَ، وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ
Ashhadu alla ilaha illallahu wahdahu la sharika lah, wa ashhadu anna Muhammadan abduhu wa rasuluh, Allahummaaj'alni minat-tawwabin, waj'alni minal-mutatahhirin.
I bear witness that there is no god worthy of worship but Allah alone, with no partner, and I bear witness that Muhammad is His servant and messenger. O Allah, make me among those who repent and among those who purify themselves.
Hadith: Tirmidhi 55, Muslim 345
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