Sunan an-Nasa'i 756
Narrated Busr bin Saeed:
It was narrated from Busr bin Sa'eed said that Zaid bin Khalid sent him to Abu Juhaim to ask him what he had heard the Messenger of Allah (ﷺ) say about one who passes in front of a person who is praying? Abu Juhaim said: "The Messenger of Allah(ﷺ)said: "If the one who passes in front of a person who is praying knew what (burden of sin) there is on him, standing for forty would be better for him than passing in front of him."
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ أَبِي النَّضْرِ، عَنْ بُسْرِ بْنِ سَعِيدٍ، أَنَّ زَيْدَ بْنَ خَالِدٍ، أَرْسَلَهُ إِلَى أَبِي جُهَيْمٍ يَسْأَلُهُ مَاذَا سَمِعَ مِنْ، رَسُولِ اللَّهِ صلى الله عليه وسلم يَقُولُ فِي الْمَارِّ بَيْنَ يَدَىِ الْمُصَلِّي فَقَالَ أَبُو جُهَيْمٍ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ لَوْ يَعْلَمُ الْمَارُّ بَيْنَ يَدَىِ الْمُصَلِّي مَاذَا عَلَيْهِ لَكَانَ أَنْ يَقِفَ أَرْبَعِينَ خَيْرًا لَهُ مِنْ أَنْ يَمُرَّ بَيْنَ يَدَيْهِ ‏"‏ ‏.‏