It is narrated from Sayyiduna Abu al-Ja'd al-Damri (may Allah be pleased with him), who had the companionship of the Messenger of Allah (peace and blessings be upon him), that the Messenger of Allah (peace and blessings be upon him) said: "Whoever abandons the Friday prayer three times out of negligence, Allah sets a seal upon his heart."
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 19120