'Abdul-Muhaimin bin 'Abbas bin Sahl As-Sa'idi narrated from his father, from his grandfather:"The Messenger of Allah wiped over his leather socks and he ordered us to wipe over the leather socks."
حَدَّثَنَا أَبُو مُصْعَبٍ الْمَدَنِيُّ، حَدَّثَنَا عَبْدُ الْمُهَيْمِنِ بْنُ الْعَبَّاسِ بْنِ سَهْلِ بْنِ سَعْدٍ السَّاعِدِيُّ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ مَسَحَ عَلَى الْخُفَّيْنِ وَأَمَرَنَا بِالْمَسْحِ عَلَى الْخُفَّيْنِ .
IbnMaja
The Book of Purification and its Sunnah • Hadith 547