السلام عليكم
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيمِ
"Whoever performs wudhu then says this dua, it would be written on vellum then sealed; thereafter, it would not be broken till the Day of Resurrection
Subhanaka allahumma wabe humdika ashadu allailaha illa anta astugferuka waatubu ilaika."
(How perfect You are O Allah, and I praise You, I bear witness that none has the right to worship except You, I seek Your forgivness and turn in repentance to You).
[Albani]
