Mishkat al-Masabih 29 Excellent Qualities and Description of the Prophet كتاب الفضائل والشمائل 75

وَعَنْهَا قَالَتْ: إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَمْ يَكُنْ يَسْرُدُ الْحَدِيثَ كَسَرْدِكُمْ كَانَ يُحَدِّثُ حَدِيثًا لَوْ عَدَّهُ الْعَادُّ لَأَحْصَاهُ. مُتَّفق عَلَيْهِ

She said: God’s messenger did not go on talking rapidly as you do, but would talk in such a way that anyone who wished to count his words would be able to do so. (Bukhari and Muslim.)