quote:

"if he who knows that he has made wudhoo' then is not sure that he has broken it - then his wudhoo' remains.  and he who knows that he has done that which breaks wudhoo' and doubts when he has made wudhoo' thereafter - then he does not have wudhoo'.  in each case he relies upon that which he is certain of before that which he has doubt about - and he throws the doubt away.  and this is the saying of the great majority of scholars - and it is the saying of aboo haneefah, ash-shafi'ee, and ahmad. (al-mughnee, 1/193, and fiqh ul-awaa'ee, 1/56) 62.  and the proof for this is what is established from aboo hurayrah who said:  the messenger of allaah (sallallaahu 'alayhi wa sallam) said:  if one of you feels something in his stomach and he is not sure did (wind) come out of it or not - then let him not leave the [masjid] until he hears a sound or finds a smell. [muslim (sharh an-nawawee, 4/51), 'aaridat-ul-ahwadhee sharh ut-tirmidhee, 1/79] so the hadeeth is a proof that things remain upon their original state until there is a certainty of a change in that, and doubt does not harm that - so he who is sure of having made wudhoo' and thinks that he may have broken it, then he remains upon wudhoo'."