وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ قَرَأَ (حم) الْمُؤْمِنَ إِلَى (إِلَيْهِ الْمَصِيرُ) وَآيَةَ الْكُرْسِيِّ حِينَ يُصْبِحُ حُفِظَ بِهِمَا حَتَّى يُمْسِيَ. وَمَنْ قَرَأَ بِهِمَا حِينَ يُمْسِي حُفِظَ بهما حَتَّى يصبح»
“If anyone recites in the morning Ha Mim al-Mumin (Al-Qur’an, 40:1-3) to ‘to Him is the final goal’ and the Throne Verse (Al-Qur’an, 2:255) he will be guarded by them till the evening, and if anyone recites them in the evening he will be guarded by them till the morning.” Tirmidhi and Darimi transmitted it, Tirmidhi saying this is a gharib tradition.
Mishkat al-Masabih 2049, Book 9, The Excellent Qualities of the Qur'an, Hadith 35. 1 min read