Abu Dawud said: This tradition has been transmitted by Harun al-Nahwi and Musa b. Khalaf from Thabit as reported by the narrator 'Abd al-Aziz.
In-book : Book 32, Hadith 15
English translation : Book 31, Hadith 3972
32. 'Dialects and Readings of the Qur''an (Kitab Al-Huruf Wa Al-Qira''at)'
باب التَّخَلِّي عِنْدَ قَضَاءِ الْحَاجَةِ