Musnad Ahmad 1156:276

Yahya ibn Abi Bukayr narrated to us, he said: Isra'il narrated to us, from Abu Ishaq, from Abu 'Abdullah al-Jadali, he said: I entered upon Umm Salamah, and she said to me: "Is the Messenger of Allah, peace and blessings of Allah be upon him, insulted among you?" I said: "I seek refuge in Allah," or "Glory be to Allah," or a word similar to it. She said: "I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: 'Whoever insults 'Ali, has indeed insulted me.'"