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. (Using translation from Abū Dāʾūd 1052)   

عَنِ النَّبِيِّ ﷺ قَالَ «مَنْ تَرَكَ ثَلَاثَ جُمَعٍ تَهَاوُنًا بِهَا طَبَعَ اللهُ عَلَى قَلْبِهِ»  

“The Messenger of Allah ﷺ said: ‘Whoever abandons Friday (prayer) three times, for no necessary reason, Allah will place a seal over his heart.’” (Using translation from Ibn Mājah 1126)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ تَرَكَ الْجُمُعَةَ ثَلَاثًا مِنْ غَيْرِ ضَرُورَةٍ طَبَعَ اللهُ عَلَى قَلْبِهِ»  

He heard Ibn Abbas and Ibn Umar narrate that while he was on the minbar, the Messenger of Allah ﷺ said: "People should stop neglecting Jumu'ah or Allah will place a seal on their hearts and they will be deemed as being among the negligent." (Using translation from Nasāʾī 1370)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ وَهُوَ عَلَى أَعْوَادِ مِنْبَرِهِ «لَيَنْتَهِيَنَّ أَقْوَامٌ عَنْ وَدْعِهِمُ الْجُمُعَاتِ أَوْ لَيُخْتَمَنَّ عَلَى قُلُوبِهِمْ ثُمَّ لَيَكُونَنَّ مِنَ الْغَافِلِينَ»  

They heard the Prophet say on his pulpit: "People should desist from failing to attend the congregations, otherwise Allah will seal their hearts, and they will be among the negligent." (Using translation from Ibn Mājah 794)   

عَنِ ابْنِ عُمَرَ وَأَبِي هُرَيْرَةَ أَنَّهُمَا سَمِعَا رَسُولُ اللهِ ﷺ يَقُولُ عَلَى أَعْوَادِ مِنْبَرِهِ «لَيَنْتَهِيَنَّ أَقْوَامٌ عَنْ وَدْعِهِمُ الْجُمُعَاتِ أَوْ لَيُخْتَمَنَّ عَلَى قُلُوبِهِمْ ثُمَّ لَيَكُونَنَّ مِنَ الْغَافِلِينَ»  

The Prophet ﷺ said: "Going to Jumu'ah is obligatory for everyone who has reached the age of puberty.'" (Using translation from Nasāʾī 1371)  

عَنْ حَفْصَةَ زَوْجِ النَّبِيِّ ﷺ أَنَّ النَّبِيَّ ﷺ قَالَ «رَوَاحُ الْجُمُعَةِ وَاجِبٌ عَلَى كُلِّ مُحْتَلِمٍ»