Dua upon completing ablution — glorification
سُبْحـانَكَ اللّهُـمَّ وَبِحَمدِك، أَشْهَـدُ أَنْ لا...
سُبْحـانَكَ اللّهُـمَّ وَبِحَمدِك، أَشْهَـدُ أَنْ لا إِلهَ إِلاّ أَنْت، أَسْتَغْفِرُكَ وَأَتوبُ إِلَـيْك
Subhanakal-lahumma wabihamdik, ashhadu an la ilaha illa ant, astaghfiruka wa-atoobu ilayk
Translation
How perfect You are O Allah, and I praise You. I bear witness that none has the right to be worshipped except You. I seek Your forgiveness and turn to You in repentance.
When to recite
Recited after completing ablution.
Source / Reference
An-Nasa'i, Al-Hakim 1/564