Muwatta MalikChapter 3Hadith 213
Full Sharh — Muwatta Malik 213
Mauquf Sahih
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عُمَرَ بْنِ مُحَمَّدِ بْنِ زَيْدٍ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ إِذَا شَكَّ أَحَدُكُمْ فِي صَلاَتِهِ فَلْيَتَوَخَّ الَّذِي يَظُنُّ أَنَّهُ نَسِيَ مِنْ صَلاَتِهِ فَلْيُصَلِّهِ ثُمَّ لِيَسْجُدْ سَجْدَتَىِ السَّهْوِ وَهُوَ جَالِسٌ .
English Translation
Yahya related to me from Malik from Umar ibn Muhammad ibn Zayd from Salim ibn Abdullah that Abdullah ibn Umar used to say, "If you are uncertain in the prayer, estimate what you think you have forgotten of the prayer and repeat it, then do the two sajdas of forgetfulness from the sitting position
Source
Muwatta Malik(موطأ مالك)
Prayer
Hadith Number
213
Grade
Mauquf Sahih