Mil, the daughter of Sayyiduna Mishrah Abu Mil (may Allah be pleased with him), narrates: I saw my father "trim his nails and then bury them," and he said: O my daughter! "This is how I saw the Messenger of Allah (peace and blessings be upon him) do it."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17893