Musnad Ahmad 25:915

Khalaf ibn al-Walid narrated to us, Isra'il narrated to us, from Simak, from 'Ikrimah, from Ibn 'Abbas, who said: When the prohibition of wine was revealed, they said: "O Messenger of Allah, what about those who died while they were drinking wine?" Then it was revealed: "There is no sin upon those who believe and do righteous deeds for what they consumed [in the past]" [Al-Ma'idah: 93], until the end of the verse.