مصنف ابن ابي شيبه
Musannaf Ibn Abi Shaybah
سجود السهو والعمل في الصلاةProstration of Forgetfulness and Actions in Salah
في الرجل يصلي (فلا يدري) زاد أو نقصIf Someone Prayed but Does Not Know How Many Rak‘ahs He Prayed, What Should He Do?
Hadith 4482
٤٤٨٢ - حدثنا وكيع عن سفيان عن محارب بن دثار قال: سمعت ابن عمر يقول: احص ما استطعت ولا تُعِدْ (١).
Hazrat Ibn Umar (may Allah be pleased with them) said: Count as much as you are able, and do not repeat the prayer.
