"In the name of Allah most gracious ever merciful..chapter 62 vrs9-10....

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 t

hat you may succeed.

Ali R.A said on the pulpit in the mosque of Kufah:
When Friday comes, the devils go to the markets with their flags, and involve people in their needs and prevent them from the Friday prayer. .

Hadith - Abu Dawood 1046.

Beware of being negligent about Jumu'ah Prayer O Brothers..::..

The Prophet (sallAllahu 'alyhiwasallam) said •►
“People should stop neglecting Jumu’ah prayers or else ALLAH will place a seal over their hearts, then they will be among then egligent.”

(Narrated by Muslim,865)

He (sallAllahu 'alyhi wasallam)also said•►

“Whoever misses Jumu’ah three times out of negligence, ALLAH will place a seal over his heart.

”(Narrated by al-Tirmidhi, 500;classed as saheeh by al-Albaani).