"Allâh's Messenger (ﷺ) said, 'If the person who passes in front of another person in (prayer) knew the magnitude of his sin, he would prefer to wait for 40 (days, months or years) rather than to pass in front of him." (An-Naḍr) said, "I do not remember exactly whether he said 40 days, months or years." [1:489-0.B.]