Il est dit dans le Coran, sourate n°62, le Vendredi (Al-Jumu‘a), verset 9 et 10
[9] 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. [10] And when the prayer has been concluded, disperse within the land and seek from the bounty of Allah, and remember Allah often that you may succeed.