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:10896al-ʿAlāʾ b. ʿAbd al-Raḥman from his father > Abū Hurayrah

[Machine] The Messenger of Allah, may ﷺ , said, "A Muslim should not attribute his fasting to the fasting of another Muslim." Abu Abdullah al-Hafiz narrated to us, Abu Ahmad al-Hafiz informed me, I am Muhammad ibn Ishaq, Abu Bakr narrated to us, Ali ibn Hujr narrated to us, Ismail ibn Jafar mentioned it.  

البيهقي:١٠٨٩٦وَرَوَاهُ إِسْمَاعِيلُ بْنُ جَعْفَرٍ عَنِ الْعَلَاءِ بْنِ عَبْدِ الرَّحْمَنِ عَنْ أَبِيهِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَا يَسُمِ الْمُسْلِمُ عَلَى سَوْمِ الْمُسْلِمِ أَخْبَرَنَاهُ أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو أَحْمَدَ الْحَافِظُ أنا مُحَمَّدُ بْنُ إِسْحَاقَ أَبُو بَكْرٍ ثنا عَلِيُّ بْنُ حُجْرٍ ثنا إِسْمَاعِيلُ بْنُ جَعْفَرٍ فَذَكَرَهُ  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ عَلِيِّ بْنِ حُجْرٍ وَغَيْرِهِ وَرَوَاهُ بَعْضُهُمْ عَنْ شُعْبَةَ عَنِ الْعَلَاءِ نَهَى أَنْ يَسُومَ الرَّجُلُ عَلَى سَوْمِ أَخِيهِ وَبَعْضُهُمْ يَبِيعُ الرَّجُلُ عَلَى بَيْعِ أَخِيهِ