Ruling on a woman in the waiting period going out to the market

Question: Is it permissible for a woman in the waiting period to go out to the market to attend to her needs?

Answer: It is permissible for a woman in the waiting period to go out to the market to attend to her needs, and to the hospital for treatment, and likewise it is permissible for her to go out for teaching and seeking knowledge; because that is among the most important needs, while avoiding adornment, perfume, and jewelry of gold, silver, and diamonds, and the like.
And a woman in the waiting period must observe five matters:
The first: remaining in the house where her husband died and in which she was residing—if that is feasible.
The second: avoiding beautiful clothing.
The third: avoiding perfume, except if she is menstruating, in which case she may use incense when she becomes pure from menstruation.
The fourth: not wearing jewelry of gold, silver, and diamonds, and the like.
The fifth: not using kohl and henna; because it has been established from the Prophet (peace and blessings be upon him) what indicates what we have mentioned. And Allah is the guarantor of success.