Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:9139ʿAlī b. ʿAbd al-ʿAzīz > Abū Nuʿaym > al-Masʿūdī > ʿAmr b. Murrah > Abū ʿUbaydah

[Machine] Abdullah used to say that the guards are being replaced by the Angels of Allah, the guardian of the night and the guardian of the day, at the break of dawn. And recite if you wish, "And recite the Qur'an at dawn, indeed the recitation of dawn is witnessed."  

الطبراني:٩١٣٩حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ الْعَزِيزِ ثنا أَبُو نُعَيْمٍ ثنا الْمَسْعُودِيُّ عَنْ عَمْرِو بْنِ مُرَّةَ عَنْ أَبِي عُبَيْدَةَ قَالَ

كَانَ عَبْدُ اللهِ يَقُولُ يَتَدَارَكُ الْحَرَسَانِ مِنْ مَلَائِكَةِ اللهِ حَارِسُ اللَّيْلِ وَحَارِسُ النَّهَارِ عِنْدَ طُلُوعِ الْفَجْرِ وَاقْرَءُوا إِنْ شِئْتُمْ {وَقُرْآنَ الْفَجْرِ إِنَّ قُرْآنَ الْفَجْرِ كَانَ مَشْهُودًا}