Book of Fasting (Kitab AlSiyam) Sunan Abi Dawud ...
Ibn Abbas explained the following Qur''anic verse: "O ye who believe! fasting is prescribed for you as it was prescribed for those before you" During the lifetime of the Prophet (ﷺ), when the people offered night prayer, they were asked to abstain from food and drink and (intercourse with) women, they kept fast till the next night.