It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that I saw Sayyiduna Sa’d bin Abi Waqqas (may Allah be pleased with him) in Iraq wiping over his leather socks while performing ablution, and I was greatly surprised and astonished at this. Later, when we gathered in a gathering of Sayyiduna Umar (may Allah be pleased with him), Sa’d (may Allah be pleased with him) said to me,“The astonishment you had regarding «مسح على الخفين» , ask your father about it.”I mentioned the whole incident to him, so he said,“When Sayyiduna Sa’d (may Allah be pleased with him) narrates a hadith before you, do not reject it, because the Prophet (peace and blessings be upon him) himself used to wipe over leather socks.”