Narrated AbuSahlah as-Sa'ib ibn Khallad: A man led the people in prayer. He spat towards qiblah while the Messenger of Allah (ﷺ) was looking at him. The Messenger of Allah (ﷺ) said to the people when he finished his prayer: He should not lead you in prayer (henceforth). Thenceforth he intended to lead them in prayer, but they forbade him and informed him of the prohibition of the Messenger of Allah (ﷺ). He mentioned it to the Messenger of Allah (ﷺ) who said to him: Yes. The narrator said: I think he (the Prophet) said: You did harm to Allah and His Apostle.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَحْمَدُ بْنُ صَالِحٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنِي عَمْرٌو، عَنْ بَكْرِ بْنِ سَوَادَةَ الْجُذَامِيِّ، عَنْ صَالِحِ بْنِ خَيْوَانَ، عَنْ أَبِي سَهْلَةَ السَّائِبِ بْنِ خَلاَّدٍ، - قَالَ أَحْمَدُ - مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم أَنَّ رَجُلاً أَمَّ قَوْمًا فَبَصَقَ فِي الْقِبْلَةِ وَرَسُولُ اللَّهِ صلى الله عليه وسلم يَنْظُرُ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم حِينَ فَرَغَ " لاَ يُصَلِّي لَكُمْ " . فَأَرَادَ بَعْدَ ذَلِكَ أَنْ يُصَلِّيَ لَهُمْ فَمَنَعُوهُ وَأَخْبَرُوهُ بِقَوْلِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَذَكَرَ ذَلِكَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ " نَعَمْ " . وَحَسِبْتُ أَنَّهُ قَالَ " إِنَّكَ آذَيْتَ اللَّهَ وَرَسُولَهُ " .
sunnah.com