Musnad Ahmad 5:624

Bahz narrated to us, Hammad bin Salamah narrated to us, Salamah bin Kuhayl informed us, from al-Sha'bi, that Ali said to Shurahah: "Perhaps you were coerced? Perhaps your husband came to you? Perhaps, perhaps?" She said: "No." He said: So when she delivered what was in her womb, he flogged her, then he stoned her. It was said to him: "You flogged her, then you stoned her?" He said: "I flogged her according to the Book of Allah, and I stoned her according to the Sunnah of the Messenger of Allah, may Allah bless him and grant him peace."