صحيح البخاري
Sahih Bukhari
كتاب الوضوء
The Book of Wudu (Ablution)
باب ما يقع من النجاسات فى السمن والماء:
Chapter. An-Najasat (impure and filthy things) which fall in cooking butter (ghee - which is obtained by evaporating moisture from butter) and water.