Where does Quran or authentic hadith say that women have to cover everything except face, hands and feet?

My question is from [this short video lecture](https://ms.jaag.pk/cont/v/sd/5/5c0e1b741eb2ed7b0002e797.mp4) . He summarizes the concept of pardah/hijab/covering in 3 points. a. Surah Noor - Lower your gaze for both men and women, i.e. look at opposite sex with respect and dignity. b. Safeguard your *sharamgaah* for both men and women. c. Ocassionally when women are wearing ornaments and make up etc, then women have to cover everything except face, hands and feet. 1. **Question from Point b above:** What is the Quranic verse which tells us to safeguard the sharamgaah? Essentially, what specific Arabic word is used for sharamgaah, and does that word only mean genitals? 2. **Questions from Point c above:** (2a) What is the source of this instruction to cover everything except face, hands and feet in case of make-up and ornaments? Where exactly is it said in Quran or authentic Hadith? (2b) I go for *no-make-up makeup look* for my office everything, which is very little make-up applied in colors close to skin-tone, so that face just looks fresh and awake (and not sick). Does it make me qualified for point c above?