Anas said that the Prophet used to break his fast before praying with some fresh dates, but if there were no fresh dates he had a few dry dates, and if there were no dry dates he took some mouthfuls* of water.
*Mirqat explains this as three mouthfuls, but 'three' does not occur in the text.
Tirmidhi and Abu Dawud transmitted it, Tirmidhi saying that this is a hasan gharib tradition.
Salman b. ‘Amir reported God’s messenger as saying, “When one of you breaks his fast he should do so with dates for they provide blessing; but if he cannot get any he should break his fast with water for it is purifying.”
Ahmad, Tirmidhi, Abu Dawud, Ibn Majah and Darimi transmitted it, but only Tirmidhi included “for they provide blessing.”
Zaid b. Khalid reported God’s messenger as saying, ‘He who gives one who has been fasting something with which to break his fast, or who equips a fighter will have a reward equivalent to his.”
Baihaqi transmitted it in Shu'ab al-iman, and Muhyi as-sunna, who said it is sahih, in Sharh as-sunna.