When you observe prayer after (the two obligatory rak'ahs) of Jumu'ah, you should observe four rak'ahs (and 'Amr in his narration has made this addition that Ibn Idris said this on the authority of Suhail): And if you are in a hurry on account of something, you should observe two rak'ahs in the mosque and two when you return (to your house).  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا صَلَّيْتُمْ بَعْدَ الْجُمُعَةِ فَصَلُّوا أَرْبَعًا زَادَ عَمْرٌو فِي رِوَايَتِهِ قَالَ ابْنُ إِدْرِيسَ قَالَ سُهَيْلٌ فَإِنْ عَجِلَ بِكَ شَىْءٌ فَصَلِّ رَكْعَتَيْنِ فِي الْمَسْجِدِ وَرَكْعَتَيْنِ إِذَا رَجَعْتَ  

[Machine] The Messenger of Allah ﷺ said, "When you pray after Jumu'ah (Friday prayer), then pray four (extra) rak'ahs. But if something urgent comes up, then pray two (extra) rak'ahs and two (extra) rak'ahs when you return." Ibn Idris said, "I do not know if this is in a hadith of the Messenger of Allah ﷺ or not."  

قَالَ رَسُولُ اللهِ ﷺ إِذَا صَلَّيْتُمْ بَعْدَ الْجُمُعَةِ فَصَلُّوا أَرْبَعًا فَإِنْ عَجِلَ بِكَ شَيْءٌ فَصَلِّ رَكْعَتَيْنِ وَرَكْعَتَيْنِ إِذَا رَجَعْتَ قَالَ ابْنُ إِدْرِيسَ وَلَا أَدْرِي هَذَا فِي حَدِيثِ رَسُولِ اللهِ ﷺ أَمْ لَا  

[Machine] The Messenger of Allah ﷺ said, "When you pray the Friday prayer, then pray four (rak'ah) after it." He said to me, my father, "O my son, when you pray in the mosque two (rak'ah), then come to the house, then pray two (rak'ah)."  

قَالَ رَسُولُ اللهِ ﷺ إِذَا صَلَّيْتُمُ الْجُمُعَةَ فَصَلُّوا بَعْدَهَا أَرْبَعًا قَالَ فَقَالَ لِي أَبِي يَا بُنَيَّ فَإِذَا صَلَّيْتَ فِي الْمَسْجِدِ رَكْعَتَيْنِ ثُمَّ أَتَيْتَ الْمَنْزِلَ أَوِ الْبَيْتَ فَصَلِّ رَكْعَتَيْنِ