Musnad Ahmad 1034:115

'Affan narrated to us, Shu'bah narrated to us, from Abu Ishaq, who said: I heard Muslim ibn Nadhir, from Hudhayfah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) took hold of the muscle of my calf—or the muscle of his calf—and said: "The lower garment is here. If you refuse, then here. If you refuse, then here. If you refuse, then there is no right for the lower garment at the ankles, or there is no right for the ankles in the lower garment."