Sayyidina Anas ibn Maalik reported that a man of Banu Abdullah ibn Ka’b said that the army of Allah’s Messenger (SAW) attacked his tribe. He went to the Prophet (SAW) and found him having his meal. He said, “Come close and eat”, The man said, “I am fasting”. The Prophet (SAW) said, “Come close. I will tell you about fasting. Allah has for given the traveller half the prayer and the pregnant woman and she who suckles the fasts”. The man said, “By Allah, he mentioned both the pregnant woman and the suckling mother, or one of them. Alas for me! why did I not eat the food of the Prophet (SAW) ?“
[Ahmed 19069, Abu Dawud 6408, Nisai 2314, Ibn e Majah 1667]