Duas, After Wuduu

Upon completing the ablution

أَشْهَدُ أَنْ لا إِلَـهَ إِلاّ اللهُ وَحْدَهُ لا شَريـكَ لَـهُ وَأَشْهَدُأَنَّ مُحَمّـداً عَبْـدُهُ وَرَسـولُـه

Transliteration

'Ash-hadu 'an lā 'ilāha 'illallāhu waḥdahu lā sharīka lahu wa 'ash-hadu 'anna Muḥammadan `abduhu wa Rasūluhu.

Translation

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

Reference

Muslim 1/209.

Upon completing the ablution

اللّهُـمَّ اجْعَلنـي مِنَ التَّـوّابينَ وَاجْعَـلْني مِنَ المتَطَهّـرين.

Transliteration

Allāhummaj`alnī minat-tawwābīna waj`alnī minal-mutaṭahhirīn.

Translation

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

Reference

At-Tirmidhi 1/78. See also Al-Albani, Sahih At- Tirmidhi 1/18