The Book of Purification
Bulugh al-Maram #46
كتاب الطهارة
وَلِأَبِي دَاوُدَ فِي رِوَايَةٍ: «إِذَا تَوَضَّأْتَ فَمَضْمِضْ»
In another verson of Abu Da’ud is:
“If you perform ablution rinse your mouth”.
وَلِأَبِي دَاوُدَ فِي رِوَايَةٍ: "إِذَا تَوَضَّأْتَ فَمَضْمِضْ"
“If you perform ablution rinse your mouth”.
— Bulugh al-Maram, Hadith 46