Voluntary Fasting - Section 3 — Mishkat al-Masabih 2071

Ibn ‘Abbas said that it was the custom of God’s messenger not to eat on the middle days* of the month whether travelling or not. *Literally, the days of the white (nights). These are the days following the thirteenth, fourteenth, and fifteenth nights of the month, the nights when there is most moonlight.Nasa’i transmitted it.