Ka‘b al-Ahbar said, “If one who passes in front of a man who is praying knew what was laid to his charge, it would be better for him to be swallowed up by the earth than to pass in front of him.” A version has “less serious for him.”
Abu Huraira reported God’s Messenger as saying, “If one of you knew what he incurred by passing in front of his brother and interfering with his prayer, it would be better for him to stop a hundred years than to take a single step.”
Ibn ‘Abbas reported God’s Messenger as saying, “When one of you prays without a sutra, an ass, a pig, a Jew, a Magian, and a woman cut off his prayer, but it will suffice if they pass in front of him at a distance of over a stone’s throw.”
‘A’isha said, “I was sleeping in front of God’s Messenger with my legs between him and the qibla. When he prostrated himself he pinched me and I drew up my legs, and when he stood up I stretched them out.” She added, “At that time there were no lamps in the houses.”
