The Prophet ﷺ said: He who leaves the Friday prayer (continuously) for three Friday on account of slackness, Allah will print a stamp on his heart.  

عَنْ أَبِي الْجَعْدِ الضَّمْرِيِّ وَكَانَتْ لَهُ صُحْبَةٌ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ تَرَكَ ثَلاَثَ جُمَعٍ تَهَاوُنًا بِهَا طَبَعَ اللَّهُ عَلَى قَلْبِهِ