عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((لَوْ يَعْلَمُ أَحَدُكُمْ مَا لَهُ فِي أَنْ يَمْشِي بَيْنَ يَدَيْ أَخِيهِ مُعْتَرِضًا وَهُوَ يُنَاجِي رَبَّهُ كَانَ أَنْ يَقِفَ فِي ذَلِكَ الْمَكَانِ مِائَةَ عَامٍ أَحَبَّ إِلَيْهِ مِنْ أَنْ يَخْطُوَ))
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: If any one of you were to know the sin incurred by passing in front of someone who is whispering to Allah (i.e., engaged in prayer), he would prefer to stand at that place for a hundred years rather than take such a step.