1336An NasaiSahih (Darussalam)أَخْبَرَنَا مُحَمَّدُ بْنُ آدَمَ، عَنْ حَفْصٍ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم سَلَّمَ ثُمَّ تَكَلَّمَ ثُمَّ سَجَدَ سَجْدَتَىِ السَّهْوِ .It was narrated from 'Abdullah that:The Prophet (ﷺ) said the salam, then he spoke, then he performed two prostrations of forgetfulness.Reference: Sunan an-Nasa'i 1329 In-book : Book 13, Hadith 151 English translation : Vol. 2, Book 13, Hadith 1330