Yahya related to me from Malik from Zayd ibn Aslam from Ata ibn Yasar that Kab al-Ahbar said, "If the person who passed in front of a man praying knew what he was bringing on himself, it would be better for him to sink into the ground than to pass in front of him."
قَالَ لَوْ يَعْلَمُ الْمَارُّ بَيْنَ يَدَىِ الْمُصَلِّي مَاذَا عَلَيْهِ لَكَانَ أَنْ يُخْسَفَ بِهِ خَيْرًا لَهُ مِنْ أَنْ يَمُرَّ بَيْنَ يَدَيْهِ
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 ﷺsaid: "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." (Using translation from Nasāʾī 756)
سَمِعَ مِنْ رَسُولِ اللهِ ﷺ فِي الْمَارِّ بَيْنَ يَدَيِ الْمُصَلِّي؟ فَقَالَ أَبُو جُهَيْمٍ قَالَ رَسُولُ اللهِ ﷺ «لَوْ يَعْلَمُ الْمَارُّ بَيْنَ يَدَيِ الْمُصَلِّي مَاذَا عَلَيْهِ لَكَانَ أَنْ يَقِفَ أَرْبَعِينَ خَيْرًا لَهُ مِنْ أَنْ يَمُرَّ بَيْنَ يَدَيْهِ»
"لَو يَعلَمُ الْمَارُّ بَينَ يدي المُصَلِّى: مَاذا عَلَيهِ لَكَانَ يَقِفُ أَربَعيِن خَيرًا لَهُ مِن أنْ يَمُرَّ بَينَ يديه".