صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب الوضوء وسننهChapters on Wudu and its Sunnahs
( 130) بَابُ غَسْلِ أَنَامِلِ الْقَدَمَيْنِ فِي الْوُضُوءِ،Chapter 130: Washing the toes in ablution
Hadith Q167
وَفِيهِ مَا دَلَّ عَلَى أَنَّ الْفَرْضَ غَسْلُهُمَا لَا مَسْحُهُمَا.
And in this is evidence that washing both feet is obligatory, not wiping over them.
