Remembering or doubting after Wudu' that a person has forgotten an obligation

Q: What is the ruling on someone who remembers - or doubts - after performing Wudu' (ablution) that he has forgotten one of its obligatory acts?

A: All praise be to Allah Alone, and peace and blessings be upon His Messenger, and his family and Companions.Anyone who knows for certain that they have forgotten to wash one of the parts of the body necessarily washed in Wudu’, which remained untouched by water, must perform Wudu’ again; while if they doubt after finishing Wudu’ whether or not they washed one of the required parts, their doubt does not count. Q: What is the ruling on someone who performs Wudu’ by washing each of the obligatory parts of the body only once so as to catch up with the congregational prayer? A: If someone washes the obligatory parts of Wudu’ only once, their Wudu’ is valid. There are many authentic Hadith that support this.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.