Narrator:Abdullah ibn Mas‘ūd
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، بِهَذَا قَالَ " فَإِذَا نَسِيَ أَحَدُكُمْ فَلْيَسْجُدْ سَجْدَتَيْنِ " . ثُمَّ تَحَوَّلَ فَسَجَدَ سَجْدَتَيْنِ . قَالَ أَبُو دَاوُدَ رَوَاهُ حُصَيْنٌ نَحْوَ حَدِيثِ الأَعْمَشِ .
This tradition has also been transmitted by ‘Abd Allah (b. Mas’ud) through a different chain of narrators. This version goes; when one of you forgets (in his prayer), he should perform two prostrations. Then he turned away, and performed two prostrations (due to forgetfulness). Abu Dawud said:
The narrator Husain also reported it like al-A'mash.
Reported by Abu Dawud (No. 1021, 1020, 1022), Al-Bukhari (No. 401), Muslim (No. 572a, 572j, 572k, 572l), An-Nasa’i (No. 1240, 1242, 1243, 1244, 1256, 1259), Ibn Majah (No. 1203, 1205, 1211, 1212) and Ahmad (No. 3420, 3786, 3827, 3960, 4057, 4118).