Sahih al-Bukhari · The Book of Wudu (Ablution)
4- بَابُ لاَ يَتَوَضَّأُ مِنَ الشَّكِّ حَتَّى يَسْتَيْقِنَ:
(4) Chapter. One should not repeat ablution if in doubt unless and until he is convinced (that he has lost his ablution by having Hadath).
1 hadith · references 137–137
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