What is the ruling on selling goods that are not in stock and are purchased when requested?

Question : In her second question, a woman says: A woman sells goods to people and brings these items when they request them from her. Is this permissible for her?

Answer : It is permissible for a person to sell what he does not have, but he must inform them, saying for example, "This goods is not with me, and I will bring it to you tomorrow." If he brings it, the contract should be made upon its arrival, not before the arrival, because the Prophet (peace and blessings be upon him) said to Hakim ibn Hizam (may Allah be pleased with him) , yes.