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:9422ʿAlī b. ʿAbd al-ʿAzīz > Abū Nuʿaym > al-Qāsim b. Maʿn > Ḥuṣayn > Balagh Ibn Masʿūd > Saʿd Yūtir Birakʿah

[Machine] "A rak'ah cannot be divided."  

الطبراني:٩٤٢٢حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ الْعَزِيزِ ثنا أَبُو نُعَيْمٍ ثنا الْقَاسِمُ بْنُ مَعْنٍ عَنْ حُصَيْنٍ قَالَ بَلَغَ ابْنَ مَسْعُودٍ أَنَّ سَعْدًا §يُوتِرُ بِرَكْعَةٍ قَالَ

«مَا أَجْزَأَتْ رَكْعَةٌ قَطُّ»