سُبْحـانَكَ اللّهُـمَّ وَبِحَمدِك، أَشْهَـدُ أَنْ لا إِلهَ إِلاّ أَنْتَ 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
At the end of a sitting or gathering (its expiation).