Sunan an-Nasa'i
Sunan an-Nasa'i 1177
أَخْبَرَنِي يَحْيَى بْنُ حَبِيبِ بْنِ عَرَبِيٍّ الْبَصْرِيُّ، قَالَ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ يَحْيَى، عَنْ عَبْدِ الرَّحْمَنِ الأَعْرَجِ، عَنِ ابْنِ بُحَيْنَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم صَلَّى فَقَامَ فِي الشَّفْعِ الَّذِي كَانَ يُرِيدُ أَنْ يَجْلِسَ فِيهِ فَمَضَى فِي صَلاَتِهِ حَتَّى إِذَا كَانَ فِي آخِرِ صَلاَتِهِ سَجَدَ سَجْدَتَيْنِ قَبْلَ أَنْ يُسَلِّمَ ثُمَّ سَلَّمَ .
Yahya ibn Habib ibn ‘Arabi al-Basri reported to me, saying: Hammad ibn Zayd reported to us, from Yahya, from ‘Abd al-Rahman al-A‘raj, from Ibn Buhaynah, that the Prophet (ﷺ) prayed and stood up after an even-numbered rak‘ah in which he had intended to sit. He continued his prayer; then, at the end of it, he performed two prostrations before saying the salutation, and then said the salutation.
Translation notes
The source describes two prostrations before the salutation; it does not explicitly label them as prostrations of forgetfulness.