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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:2955 – Muḥammad b. al-ʿAbbās > Muḥammad b. Ḥātim > Hushaym > Yūnus And Manṣūr > al-Ḥasan

[Machine] He used to say, "Recite silently behind the imam in every prayer with the opening chapter of the book in your heart."  

البيهقي:٢٩٥٥ – قَالَ وَثنا مُحَمَّدُ بْنُ الْعَبَّاسِ ثنا مُحَمَّدُ بْنُ حَاتِمٍ ثنا هُشَيْمٌ أنبأ يُونُسُ وَمَنْصُورٌ عَنِ الْحَسَنِ

أَنَّهُ كَانَ يَقُولُ اقْرَأْ خَلْفَ الْإِمَامِ فِي كُلِّ صَلَاةٍ بِفَاتِحَةِ الْكِتَابِ فِي نَفْسِكَ  

See similar narrations below:

Collected by Bayhaqī, Suyūṭī
bayhaqi:2939 – Abū Saʿīd Yaḥyá b. Muḥammad b. Yaḥyá > Abū Baḥr al-Barbahārī > Bishr b. Mūsá > al-Ḥumaydī > Wakīʿ > Ismāʿīl b. Abū Khālid > al-ʿAyzār b. Ḥurayth > Ibn ʿAbbās

[Machine] Read behind the Imam with the opening chapter of the book.  

البيهقي:٢٩٣٩ – أَخْبَرَنَا أَبُو سَعِيدٍ يَحْيَى بْنُ مُحَمَّدِ بْنِ يَحْيَى أنبأ أَبُو بَحْرٍ الْبَرْبَهَارِيُّ ثنا بِشْرُ بْنُ مُوسَى ثنا الْحُمَيْدِيُّ ثنا وَكِيعٌ ثنا إِسْمَاعِيلُ بْنُ أَبِي خَالِدٍ عَنِ الْعَيْزَارِ بْنِ حُرَيْثٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

اقْرَأْ خَلْفَ الْإِمَامِ بِفَاتِحَةِ الْكِتَابِ