مُوَطَّأُ مَالِكٍ
Muwatta Malik 245
Jumu'a
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ صَفْوَانَ بْنِ سُلَيْمٍ، - قَالَ مَالِكٌ لاَ أَدْرِي أَعَنِ النَّبِيِّ صلى الله عليه وسلم أَمْ لاَ - أَنَّهُ قَالَ مَنْ تَرَكَ الْجُمُعَةَ ثَلاَثَ مَرَّاتٍ مِنْ غَيْرِ عُذْرٍ وَلاَ عِلَّةٍ طَبَعَ اللَّهُ عَلَى قَلْبِهِ .
Yahya related to me from Malik that Safwan ibn Sulaym said, "If anyone omits jumua three times without reason or illness, Allah will set a seal on his heart." (Malik said, "I don't know if it was from the Messenger of Allah, (ﷺ), or not.")
Arabic/English book reference: Book 5, Hadith 22