Narrated 'Abdullah bin 'Umar and Abu Hurairah (RA):

They heard Allah's Messenger (ﷺ) say (while standing) upon the planks of his pulpit: "People must cease to neglect the Friday prayers, or else Allah will seal their hearts and then they will be among the unmindful." [Reported by Muslim].

عَنْ عَبْدِ اَللَّهِ بْنِ عُمَرَ, وَأَبِي هُرَيْرَةَ رَضِيَ اَللَّهُ عَنْهُمْ, { أَنَّهُمَا سَمِعَا رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-يَقُولُ ‏-عَلَى أَعْوَادِ مِنْبَرِهِ‏- "لَيَنْتَهِيَنَّ أَقْوَامٌ عَنْ وَدْعِهِمُ اَلْجُمُعَاتِ, أَوْ لَيَخْتِمَنَّ اَللَّهُ عَلَى قُلُوبِهِمْ, ثُمَّ لَيَكُونُنَّ مِنَ اَلْغَافِلِينَ } رَوَاهُ مُسْلِمٌ .‏ [1]‏ .‏