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.
bayhaqi:3633al-Shaykh And Qad Ruwwīnā > Saʿīd b. al-Musayyib Waʿaṭāʾ b. Abū Rabāḥ Wa-al-Ḥasan al-Baṣrī And Muḥammad b. Sīrīn Waʾabī Qilābah > Qatādah > ʿAlī b. Abū Ṭālib > Mā Adrakt Maʿ

[Machine] "What you have learned from the Imam is the first part of your prayer, so complete what has come before you from the Quran. Abu Abdur Rahman as-Sulami informed us, Ali ibn Umar al-Hafiz narrated to us, Abu Bakr an-Naysaburi narrated to us, Muhammad ibn Yahya narrated to us, Abdul Razzaq informed us through Ma'mar from Qatadah, who mentioned that Ma'mar also narrated from Qatadah, who narrated from Saeed ibn Musayyib, similar to the statement of Ali ibn Abi Talib. And even though it is attributed to Ali, it serves as testimony to the narration of al-Harith from Ali."  

البيهقي:٣٦٣٣قَالَ الشَّيْخُ وَقَدْ رُوِّينَا عَنْ سَعِيدِ بْنِ الْمُسَيِّبِ وَعَطَاءِ بْنِ أَبِي رَبَاحٍ وَالْحَسَنِ الْبَصْرِيِّ وَمُحَمَّدِ بْنِ سِيرِينَ وَأَبِي قِلَابَةَ وَعَنْ قَتَادَةَ أَنَّ عَلِيَّ بْنَ أَبِي طَالِبٍ ؓ قَالَ

مَا أَدْرَكْتَ مَعَ الْإِمَامِ فَهُوَ أَوَّلُ صَلَاتِكَ وَاقْضِ مَا سَبَقَكَ بِهِ مِنَ الْقُرْآنِ أَخْبَرَنَاهُ أَبُو عَبْدِ الرَّحْمَنِ السُّلَمِيُّ أنبأ عَلِيُّ بْنُ عُمَرَ الْحَافِظُ ثنا أَبُو بَكْرٍ النَّيْسَابُورِيُّ ثنا مُحَمَّدُ بْنُ يَحْيَى ثنا عَبْدُ الرَّزَّاقِ أنبأ مَعْمَرٌ عَنْ قَتَادَةَ فَذَكَرَهُ قَالَ وَثنا مَعْمَرٌ عَنْ قَتَادَةَ عَنْ سَعِيدِ بْنِ الْمُسَيِّبِ مِثْلَ قَوْلِ عَلِيِّ بْنِ أَبِي طَالِبٍ ؓ هَذَا وَإِنْ كَانَ مُرْسَلًا عَنْ عَلِيٍّ ؓ فَهُوَ شَاهِدٌ لِرِوَايَةِ الْحَارِثِ عَنْ عَلِيٍّ ؓ