مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1019
Prayer
Forgetfulness - Section 2
عَنْ عِمْرَانَ بْنِ حُصَيْنٍ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صَلَّى بهم فَسَهَا فَسجدَ سَجْدَتَيْنِ ثُمَّ تَشَهَّدَ ثُمَّ سَلَّمَ. رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ
‘Imran b. Husain said that the Prophet (ﷺ) led them in prayer and forgot something, so he made two prostrations, then uttered the shahada, then gave the salutation. Tirmidhi transmitted it and said this is a hasan gharib tradition.
Mishkat al-Masabih, 1019ضَعِيف (الألباني)