Dua after wudu

أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنَّ مُحَمَّدًا عَبْدُ اللَّهِ وَرَسُولُهُ

Ash-hadu an lā ilāha illallāhu wa anna Muḥammadan 'abdullāhi wa rasūluh

I bear witness that there is no god but Allah, and that Muhammad is the servant of Allah and His Messenger.

At-Tirmidhi's narration adds:

اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ

Allāhummaj'alnī minat-tawwābīna waj'alnī minal-mutaṭahhirīn

O Allah, make me one of those who turn to You in repentance, and make me one of those who keep themselves pure.