Abu Dawud said: Only the people of Basrah have narrated the tradition on visiting the sick after performing ablution.
In-book : Book 21, Hadith 9
English translation : Book 20, Hadith 3091
21. 'Funerals (Kitab Al-Jana''iz)'
باب فِي فَضْلِ الْعِيَادَةِ عَلَى وُضُوءٍ