Salman ibn 'Amir reported that the Prophet, may Allah bless him and grant him peace, said, "When one of you breaks the fast, he should break it with dates. They are a blessing. If he cannot find any dates, then water. It is pure." He said, "Sadaqa given to a poor person is sadaqa but to a relative it is both sadaqa and maintaining ties of kinship."

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 3, hadith number 332 - Sunni Hadith