In the culture of my parents' home country and in those of many Muslim-majority countries, showing or placing the soles of one's feet in the direction of someone else is considered disrespectful. I do not know of any Islamic source which also deems this disrespectful, although I hear many Muslims from Muslim-majority countries claim that this is considered to be disrespectful and sinful in Islam. Does anyone know of an Islamic source that would suggest that showing or placing the soles of one's feet in the direction of someone else is disrespectful and/or sinful? Please note that I am not suggesting that, even if there is no Islamic basis for this act's being disrespectful, one should do in the presence of those who would take offense to it. I am simply wanting to know if this view of its being disrespectful and/or sinful is one derived from Islamic sources.
JazakAllah Khayran for all of your help.