فمعناه إذا نسي أن يستنجي بالماء لا أنه نسي أن يستنجي على كل وجه، لانه إذا استنجى بالحجر فقد أجزأه ذلك عن الماء، يدل على ذلك ما تقدم ذكره من الاخبار، ويزيده تأكيدا.
The meaning of this Hadith is that if he forgets to cleanse himself with water but has already used stones (istijmar), this suffices and exempts him from the requirement of using water. It does not imply that he forgot to cleanse himself entirely. This understanding is supported by previously mentioned narrations, and this interpretation is further strengthened by those narrations.
