Musnad Abu Ya'la al-Mawsili 209:50

Al-Hasan ibn Hammad al-Kufi narrated to us, Waki’ narrated to us, from Dawud ibn Abi ‘Abd Allah, from [Ibn] Jud’an, from Umm Salamah: That the Prophet (peace and blessings of Allah be upon him) called a servant, and she was slow [in coming], and in his hand was a siwak. He said: "Were it not for the retribution (qisas), I would have struck you with this siwak."