Musnad Ahmad 652:100

Hushaym narrated to us, from Abu Bishr, from Habib ibn Salim, from al-Nu’man ibn Bashir, who said: A woman came to him and said that her husband had intercourse with her slave girl. He said: "As for me, I have a healing report regarding that which I took from the Messenger of Allah (peace and blessings of Allah be upon him): If you had given him permission, I would lash him one hundred times; and if you had not given him permission, I would stone him." He said: So the people turned to her and said: "Your husband will be stoned, so say that you had given him permission." She said: "I had given him permission." So he brought him forward and lashed him one hundred times.