Musnad Ahmad 562:6

'Abd al-Samad narrated to us, Shu'bah narrated to us, 'Asim narrated to us, from Abu Hajib, from al-Hakam al-Ghifari: "That the Prophet, peace and blessings of Allah be upon him, forbade performing ablution with her remainder (fadliha). He (the narrator) does not know if it was the remainder of her ablution, or the remainder of her drink (su'riha)."