´Iyad bin Hilal said:` "I said to Abu Sa'eed: 'One of us performs Salat and we do not know how (much) we prayed.' So he said: 'Allah's Messenger (S) said: "When one of you performs Salat and he does now know how (much) he prayed then let him perform two prostrations while he is sitting."
Hadith Referenceسنن ترمذي / أبواب السهو / 396
Hadith Gradingالألبانی:صحيح، ابن ماجة (1204)
Hadith Takhrij«سنن ابی داود/ الصلاة 198 (1029) ، سنن ابن ماجہ/الإقامة 129 (1204) ، ( تحفة الأشراف : 4396) ، مسند احمد (3/12، 37، 50، 51، 54) (صحیح) (ہلال بن عیاض یا عیاض بن ہلال مجہول راوی ہیں، لیکن شواہد سے تقویت پا کر یہ حدیث صحیح ہے)»
´Abu Hurairah narrated that:` Allah's Messenger (S) said: "Indeed the Shaitan comes to one of you in his Salat confusing him until he does now know how much he has prayed. When one of you experiences that then let him perform two prostrations while sitting."
Hadith Referenceسنن ترمذي / أبواب السهو / 397
Hadith Gradingالألبانی:صحيح، صحيح أبي داود (943 - 345)
´Abdur-Rahman bi Awf narrated that he heard the Prophet (S) saying:` "When one of you becomes forgetful in his Salat so that he does not know if he prayed one or two, then let him consider it one. When he does not know if he prayed three or four, then let him consider it three, and let him perform two prostrations before he says the Taslim."
Hadith Referenceسنن ترمذي / أبواب السهو / 398
Hadith Gradingالألبانی:صحيح، ابن ماجة (1209)
Hadith Takhrij«سنن ابن ماجہ/الإقامة 32 (1209) ، ( تحفة الأشراف : 9722) ، مسند احمد (1/190، 193) (صحیح)»