An employee buying and selling during work hours

A: It is impermissible for employees to leave their work place during working hours to buy and sell whether they are permitted by their supervisors or not. This is because doing so involves disobeying rulers who ban this practice. Moreover, leaving their work places leads these employees to neglect the work that they have been entrusted with, and this results in failing to fulfill Muslims' rights (Part No. 23; Page No. 416) and mismanaging their affairs, while it is narrated by Abu Ya`la and Al-`Askary in a Hadith Marfu` (a Hadith narrated from the Prophet with a connected or disconnected chain of narration) on the authority of `Aishah that the Prophet (peace be upon him) said: Allah loves that when a person engages in some work, they perform it with proficiency. (Both Al-Bayhaqy and Al-Tabarany related another Hadith to the same effect). May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.