(52) باب الرُّخْصَةِ فِي ذَلِكَ
Narrated Al-Laith:
When it was mentioned to Ibn Shihab (al-Zuhri) that fasting on Saturday had been prohibited, he would say: This is a Himsi tradition.
Reference: Sunan Abi Dawud 2423
In-book reference: Book 14, Hadith 111
English translation: Book 13, Hadith 2417