Musannaf Ibn Abi Shayba 26:94

'Abdah narrated to us, from Muhammad ibn 'Amr, from Sharik ibn 'Abdullah ibn [Abi] Nimr: He said: The Prophet, peace and blessings of Allah be upon him, was asked about the inheritance of the paternal aunt and the maternal aunt while he was riding. He remained silent. Then he traveled for a short while, and then said: "Gabriel informed me that there is no inheritance for them."