"O you who have believed, when (the adhan)  is called for the prayer on the day of Jumu'ah  (Friday), then proceed to the remembrance of Allah and leave trade. That is better for you, if you only knew. And when the prayer has been concluded, disperse within the land and seek from the bounty of Allah, and remember Allah often so that you may succeed."

[Jumu'ah:9-10]