Hadith 1287

Abu Umama said the Prophet used to pray the two of them after the witr seated, and recited in the course of them, “When the earth is shaken’’, 1 and "Say, O infidels."2 Al-Qur’an; 99 Al-Qur’an; 109 Ahmad transmitted it.

وَعَنْ أَبِي أُمَامَةَ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يُصَلِّيهِمَا بَعْدَ الْوِتْرِ وَهُوَ جَالس يقْرَأ فيهمَا (إِذا زلزلت) و (قل يَا أَيهَا الْكَافِرُونَ) رَوَاهُ أَحْمد

Reference: 5612870
In-book reference: Book 4, Hadith 1287