Sunnan
an-Nasai
سنن النسائي
13
The Book of Forgetfulness (In Prayer)
كتاب السهو
Chapter 25: Estimating (what is most likely the case)
باب التَّحَرِّي
Sunnan an-Nasai 1247
It was narrated that Ibrahim said
"They used to say: 'If one is not sure of what he estimates is correct, then prostrate twice.'"أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنِ ابْنِ عَوْنٍ، عَنْ إِبْرَاهِيمَ، قَالَ كَانُوا يَقُولُونَ إِذَا أَوْهَمَ يَتَحَرَّى الصَّوَابَ ثُمَّ يَسْجُدُ سَجْدَتَيْنِ .
Grade: Sahih Darussalam