The ruling on praying in light clothing that does not cover the 'awrah

Question:
We know that it is obligatory to cover the 'awrah in prayer, but we find that many people wear light clothing that exposes their 'awrah, and this invalidates the prayer. So we ask your eminence to clarify this for the people, and may Allah reward you with good.

Answer:
It is obligatory for the believer, if he sees something from one of them, to advise him. If he sees from him negligence, and light clothing that exposes his 'awrah, he should advise him and disapprove of this action from him; because this is not permissible to be left unaddressed among the believers. So if a person sees from his brother, or from his wife, or from his daughter, or from his sister, or sees from his friend, or from whoever prays in the mosque, or in any place; he should disapprove of it from him.

Question: The socks, this thin one that does not cover the foot, is it permissible to wipe over it?

Answer: No, the sock must be covering.

Question: What is the ruling on praying in these light clothes through which the 'awrah is visible?

Answer: If the thigh is visible, or the 'awrah is visible; the prayer is invalid.