صَحِيحُ مُسْلِمٍ
Sahih Muslim 572 c
The Book of Mosques and Places of Prayer
As-Sahw (forgetfulness) in prayer and prostrating to compensate for it
وَحَدَّثَنَاهُ عَبْدُ اللَّهِ بْنُ عَبْدِ الرَّحْمَنِ الدَّارِمِيُّ، أَخْبَرَنَا يَحْيَى بْنُ حَسَّانَ، حَدَّثَنَا وُهَيْبُ بْنُ خَالِدٍ، حَدَّثَنَا مَنْصُورٌ، بِهَذَا الإِسْنَادِ وَقَالَ مَنْصُورٌ فَلْيَنْظُرْ أَحْرَى ذَلِكَ لِلصَّوَابِ .
This hadith is reported by Mansur with the same chain of transmitters, but with these words: " He should aim at correct (prayer) and it is advisable."
Sahih Muslim, 572 cSahihصحيح