Musnad Ahmad 482:146

Yahya ibn Ghaylan narrated to us, Rashdin narrated to us, 'Amr ibn al-Harith and al-Hasan ibn Thawban narrated to me, from Yazid ibn Abi Habib, from Abu al-Khayr, from 'Uqbah ibn 'Amir, who said: A man asked the Messenger of Allah, peace and blessings of Allah be upon him, to give charity on behalf of his mother from some jewelry that belonged to her after her death. The Messenger of Allah, peace and blessings of Allah be upon him, said to him: "Did I command you to do that?" He said: "No." He said: "Then do not."