Certainty is not removed by doubt

A: All praise be to Allah Alone, and peace and blessings be upon His Messenger, and his family and Companions. If you entertain doubts of Hadath (ritual impurity invalidating ablution) after having performed Taharah (ritual purification), cast doubts away and act based upon your state of Taharah, because certainty is not overruled by doubt.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.