Musannaf Ibn Abi Shayba 1:558

558. 'Abd al-Wahhab al-Thaqafi narrated to us, from Khalid, from Abu Qilabah, that he used to command [people] to perform ablution (wudu) from what the fire has changed. And he once gave them nabidh (a drink made from soaked dates or raisins) to drink, then he commanded them to perform ablution, so they performed ablution.