Mukhtasar Bukhari (Abridged) 1229 — Virtue of fasting during jihad

Narrated Abu Sa'id Al-Khudri (may Allah be pleased with him): I heard the Prophet (peace and blessings of Allah be upon him) say: "Indeed, whoever fasts for one day in the way of Allah (i.e., in jihad), Allah will distance his face from the Hellfire by a distance of seventy years."