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Abu Huraira reported God’s Messenger as saying, “If any of you prays after the Friday noon prayer, he should pray four rak'as.” Muslim transmitted it. In another version by him he said, “When any of you prays the Friday noon prayer, he should pray four rak'as after it.”
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ كَانَ مِنْكُمْ مُصَلِّيًا بَعْدَ الْجُمُعَةِ فَلْيُصَلِّ أَرْبَعًا» . رَوَاهُ مُسْلِمٌ وَفِي أُخْرَى لَهُ قَالَ: «إِذَا صَلَّى أَحَدُكُمُ الْجُمُعَةَ فَلْيُصَلِّ بَعْدَهَا أَرْبعا»
sunnah.com