Hisnul Muslim 15

Upon completing the ablution

سُبْحـَانَكَ اللَّهُـمَّ وَبِحَمْدِكَ، أَشْهَـدُ أَنْ لاَ إِلَهَ إِلاَّ أَنْتَ، أَسْتَغْفِرُكَ وَأَتُوبُ إِلَـيْكَ

Subhaanaka Allaahumma wa bihamdika, 'ash-hadu 'an laa 'ilaaha 'illaa 'Anta, 'astaghfiruka wa 'atoobu 'ilayk.

Glory is to You, O Allah, and praise. I bear witness that there is none worthy of worship but You. I seek Your forgiveness and turn to You in repentance.