Does the exit of waste (feces or urine) from other than the usual passages invalidate ablution?
Chapter on What Nullifies Purification
Al-Mughni
Book of Purification
Primary text
Feces and urine invalidate ablution whether they exit from the usual passages or from other locations. The amount, whether small or large, makes no difference, regardless of whether the usual passages are obstructed or open, or if the exit is above or below the stomach.
Supporting text
Shafi'i scholars state that if the primary exit is blocked but another opens below the stomach, ablution is invalidated unequivocally. If the opening is above the stomach, there are two opinions: one holds it invalidates *wudu*, and the other holds it does not. If the usual excretion habit remains, the famous opinion is that exit from other than the usual passages does not invalidate *wudu*, based on the principle that non-passage exit does not invalidate.