Supplication upon completing ablution

أَشْهَدُ أَنْ لَّآ إِلٰهَ إِلَّا اللهُ وَحْدَهٗ لَا شَرِيْكَ لَهٗ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهٗ وَرَسُوْلُهٗ

I bear witness that none has the right to be worshipped but Allah alone, Who has no partner; and I bear witness that Muḥammad is His slave and His Messenger.

[Sahih Muslim – 234]

اَللّٰهُمَّ اجْعَلْنِيْ مِنَ التَّوَّابِيْنَ وَاجْعَلْنِيْ مِنَ الْمُتَطَهِّرِيْنَ

O Allah, make me among those who turn to You in repentance, and make me among those who are purified.

[Jame Tirmizi – 55]

سُبْحَانَكَ اللّٰهُمَّ وَبِحَمْدِكَ، أَشْهَدُ أَنْ لَّآ إِلٰهَ إِ لَّآ أَنْتَ، أَسْتَغْفِرُكَ وَأَتُوْبُ إِلَيْكَ

How perfect You are, O Allah, and praise is for you; I bear witness that there is none worthy of worship but You. I seek Your forgiveness and turn to You in repentance.

[Sunan Al Kubra An-Nasai – 6/25, Hadees 9909]