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:8237 – Abū ʿAbdullāh al-Ḥāfiẓ And ʾAbū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās > al-Aṣam > Yaḥyá b. Abū Ṭālib > ʿAbd al-Wahhāb b. ʿAṭāʾ > Saʿīd > Ibn Abū ʿArūbah > ʿAlī b. al-Ḥakam > ʿAbdullāh b. Abū Mulaykah > ʿUqbah b. al-Ḥārith

[Machine] To spend it separately means to observe the fasting of Ramadan.  

البيهقي:٨٢٣٧ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ وَأَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو قَالَا ثنا أَبُو الْعَبَّاسِ هُوَ الْأَصَمُّ ثنا يَحْيَى بْنُ أَبِي طَالِبٍ أنبأ عَبْدُ الْوَهَّابِ بْنُ عَطَاءٍ أنبأ سَعِيدٌ هُوَ ابْنُ أَبِي عَرُوبَةَ عَنْ عَلِيِّ بْنِ الْحَكَمِ عَنْ عَبْدِ اللهِ بْنِ أَبِي مُلَيْكَةَ عَنْ عُقْبَةَ بْنِ الْحَارِثِ أَنَّ أَبَا هُرَيْرَةَ كَانَ لَا يَرَى بِقَضَائِهِ بَأْسًا

أَنْ يَقْضِيَهُ مُفَرَّقًا يَعْنِي قَضَاءَ صَوْمِ رَمَضَانَ