Qur'an, Al-Jumu'ah, Surah 62:9-10
O ye who believe! When the call is proclaimed to prayer on Friday (the Day of Assembly), hasten earnestly to the Remembrance of Allah, and leave off business (and traffic): That is best for you if ye but knew!
And when the Prayer is finished, then may ye disperse through the land, and seek of the Bounty of Allah. and celebrate the Praises of Allah often (and without stint): that ye may prosper.