A man of Juhaynah told him that he had heard the Prophet ﷺ reciting "When the earth is shaken" (Surah 99) in both rak'ahs of the morning prayer. But I do not know whether he had forgotten, or whether he recited it on purpose. (Using translation from Abū Dāʾūd 816)
أَخْبَرَهُ أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يَقْرَأُ فِي صَلَاةِ الصُّبْحِ إِذَا زُلْزِلَتِ الْأَرْضُ فِي الرَّكْعَتَيْنِ كِلْتَيْهِمَا فَلَا أَدْرِي أَنَسِيَ النَّبِيُّ ﷺ أَمْ قَرَأَ ذَلِكَ عَمْدًا وَرُوِّينَا عَنِ النَّبِيِّ ﷺ أَنَّهُ صَلَّى بِالْمُعَوِّذَتَيْنِ صَلَاةَ الصُّبْحِ لِلنَّاسِ وَذَلِكَ يَرِدُ