Al-Qari : And Muhammad ibn Ahmad ibn Abi Khalaf narrated to me, and Musa ibn Dawud narrated to us, and Sulayman ibn Bilal narrated to us, from Zayd ibn Aslam, from Ata ibn Yasar, from Abu Sa'id al-Khudri, who said: The Messenger of Allah (peace and blessings be upon him) said:
When any one of you is in doubt about his prayer and he does Dot know how much he has prayed, three or four (rak'ahs). he should cast aside his doubt and base his prayer on what he is sure of. then perform two prostrations before giving salutations. If he has prayed five rak'ahs, they will make his prayer an even number for him, and if he has prayed exactly four, they will be humiliation for the devil.
إذا شك أحدكم في صلاته فلم يدر كم صلى ثلاثا أم أربعا فليطرح الشك وليبن على ما استيقن ثم يسجد سجدتين قبل أن يسلم فإن كان صلى خمسا شفعن له صلاته وإن كان صلى إتماما لأربع كانتا ترغيما للشيطان .
