Sayyiduna Salman Farsi (Radi Allahu Anhu) has narrated that the Beloved and Blessed Rasool (SallAllahu Alayhi wa Sallam) has said,
"If anyone serves a fasting Muslim with Iftar, angels will pray for his forgiveness in Ramadan, and Jibrail (Alayhis Salam) will pray for his forgiveness at Laylat al-Qadr." [Tabarani, Mu’jam Kabeer, Vol. 6, Page 262, Hadith 6162]
According to a narration,
"If anyone serves a person with Iftar in Ramadan with Halal earnings, the angels will send Durud upon him at every night of Ramadan, and Jibrail (Alayhis Salam) will shake his hands with such a person at Laylatul Qadr. If Jibrail (Alayhis Salam) shakes hands with a person, his eyes will shed tears (due to the fear of Allah) and his heart will become soft." [Kanz al-Ummal, Vol. 8, Page 215, Hadith 23653]
Another Hadith states,
"If anyone serves a fasting Muslim with water, Allah will make him drink water from my pond (Hawd) and he will not feel thirst till he enters Heaven." [Sahih Ibn Khuzaymah, Vol. 3, Page 192, Hadith 1887]