قَالَ قَرَأْتُ عَلَى عَبْدِ الرَّحْمَنِ : مَالِكٌ وَحَدَّثَنَا إِسْحَاقُ قَالَ أَخْبَرَنَا مَالِكٌ عَنْ نَافِعٍ أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ قَالَ إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَأَى بُصَاقًا فِي جِدَارِ الْقِبْلَةِ فَحَكَّهُ ثُمَّ أَقْبَلَ عَلَى النَّاسِ فَقَالَ إِذَا كَانَ أَحَدُكُمْ يُصَلِّي فَلَا يَبْصُقَنَّ قِبَلَ وَجْهِهِ فَإِنَّ اللَّهَ عَزَّ وَجَلَّ قِبَلَ وَجْهِهِ إِذَا صَلَّى قَالَ إِسْحَاقُ فِي حَدِيثِهِ بُصَاقًا
مسند امام احمد بن حنبل · Hadith 5335
It was narrated from Naafi' that 'Abdullah ibn 'Umar said: The Messenger of Allah (PBUH) saw some sputum on the wall of the qiblah. He scratched it then he turned to the people and said: "if one of you is praying, let him not spit in front of him, for Allah is in front of him when he prays."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020
Sanad
قَالَ قَرَأْتُ عَلَى عَبْدِ الرَّحْمَنِ : مَالِكٌ وَحَدَّثَنَا إِسْحَاقُ قَالَ أَخْبَرَنَا مَالِكٌ عَنْ نَافِعٍ