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
muslim:547b – [Chain 1] Abū Bakr b. Abū Shaybah > ʿAbdullāh b. Numayr And ʾAbū Usāmah [Chain 2] Ibn Numayr > Abū > ʿUbaydullāh [Chain 3] Qutaybah And Muḥammad b. Rumḥ > al-Layth b. Saʿd [Chain 4] Zuhayr b. Ḥarb > Ismāʿīl / Ibn ʿUlayyah > Ayyūb [Chain 5] Ibn Rāfiʿ > Ibn Abū Fudayk > al-Ḍaḥḥāk / Ibn ʿUthmān [Chain 6] Hārūn b. ʿAbdullāh > Ḥajjāj b. Muḥammad > Qāl Ibn Jurayj > Mūsá b. ʿUqbah > Nāfiʿ > Ibn ʿUmar

Ibn Umar reported that the Messenger of Allah ﷺ saw sputum sticking to the Qibla wall of the mosque, the rest of the hadith is the same.  

مسلم:٥٤٧b – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ وَأَبُو أُسَامَةَ ح وَحَدَّثَنَا ابْنُ نُمَيْرٍ حَدَّثَنَا أَبِي جَمِيعًا عَنْ عُبَيْدِ اللَّهِ ح وَحَدَّثَنَا قُتَيْبَةُ وَمُحَمَّدُ بْنُ رُمْحٍ عَنِ اللَّيْثِ بْنِ سَعْدٍ ح وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا إِسْمَاعِيلُ يَعْنِي ابْنَ عُلَيَّةَ عَنْ أَيُّوبَ ح وَحَدَّثَنَا ابْنُ رَافِعٍ حَدَّثَنَا ابْنُ أَبِي فُدَيْكٍ أَخْبَرَنَا الضَّحَّاكُ يَعْنِي ابْنَ عُثْمَانَ ح وَحَدَّثَنِي هَارُونُ بْنُ عَبْدِ اللَّهِ حَدَّثَنَا حَجَّاجُ بْنُ مُحَمَّدٍ قَالَ قَالَ ابْنُ جُرَيْجٍ أَخْبَرَنِي مُوسَى بْنُ عُقْبَةَ كُلُّهُمْ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ رَأَى نُخَامَةً فِي قِبْلَةِ الْمَسْجِدِ إِلاَّ الضَّحَّاكَ فَإِنَّ فِي حَدِيثِهِ نُخَامَةً فِي الْقِبْلَةِ بِمَعْنَى حَدِيثِ مَالِكٍ