The ruling on a man shaking hands with his wife's uncle
Machine translationRead the Arabic original
The questioner : Shaykh, is it permissible for my uncle to shake hands with my wife?
The Shaykh : How?
The questioner : My uncle, my father's brother, is he allowed to shake hands with my wife?
The Shaykh : You mean your uncle, your father's brother; is he a mahram (a relative one may not marry) to your wife?
The questioner : Yes, that is the question.
The Shaykh : No.
The questioner : No, he is not a mahram, is he?
The Shaykh : Yes, he must not shake hands with her.
The Shaykh : How?
The questioner : My uncle, my father's brother, is he allowed to shake hands with my wife?
The Shaykh : You mean your uncle, your father's brother; is he a mahram (a relative one may not marry) to your wife?
The questioner : Yes, that is the question.
The Shaykh : No.
The questioner : No, he is not a mahram, is he?
The Shaykh : Yes, he must not shake hands with her.
Source
سلسلة الهدى والنور، المجلس 1109 — d3watuna.com (16:56)
The Arabic text is a machine transcription of the audio recording.