Mu'adh bin Abdullah al-Juhani (may Allah be pleased with him) said that a man from the Juhaynah tribe told him that he heard the Prophet (peace and blessings be upon him) recite "When the earth is shaken with its earthquake" [Surah al-Zalzalah: 1] in both rak'ahs of the morning prayer. I do not know whether the Messenger of Allah (peace and blessings be upon him) did so out of forgetfulness or deliberately.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4021