Another narration of both (al-Bukhari and Muslim) has:

'two Rak'at after Jumu'ah prayer in his house.'

وَفِي رِوَايَةٍ لَهُمَا : { وَرَكْعَتَيْنِ بَعْدَ اَلْجُمْعَةِ فِي بَيْتِهِ } .‏ [1]‏