the Prophet said: "Tawaf around the House is similar to Salat except that you talk during it. So whoever talks in it, then let him not say but good."  

أَنَّ النَّبِيَّ ﷺ قَالَ الطَّوَافُ حَوْلَ الْبَيْتِ مِثْلُ الصَّلاَةِ إِلاَّ أَنَّكُمْ تَتَكَلَّمُونَ فِيهِ فَمَنْ تَكَلَّمَ فِيهِ فَلاَ يَتَكَلَّمَنَّ إِلاَّ بِخَيْرٍ