"None should fast except the one who intended to fast before dawn."
Sunan an-Nasa'i Book 22, Hadith 254
← Previous Hadith "If a man does not intend to fast from the night before, he should not fast."

Sunan an-Nasa'i Book 22, Hadith 253 Next Hadith → "The Messenger of Allah said: 'The most beloved fasting to Allah, the mighty and sublime, is the fast of Dawud, peace be upon him. He used to fast one day and not the next. And the most beloved prayer to Allah, the mighty and sublime, is the prayer of Dawud, peace be upon him. He used to sleep half the night, stand for one-third of it (in prayer), and sleep for one-sixth of it."'

Sunan an-Nasa'i Book 22, Hadith 255