Who is the fasting person for whom the Muslim will be rewarded for giving him food to break his fast with?
Question

                Is the fasting person who the Messenger (blessings and peace of Allah be upon him) encouraged us to give him food to break his fast with the poor person who is fasting, or one who is a stranger in the land, or the one whom we invite to break the fast with us at home, such as a guest who is part of the family or a relative? Can we attain the reward by offering food for breaking the fast to fasting people to whom we give a private invitation during Ramadan?.
Praise be to Allah.
    It is proven that the Prophet (blessings and peace of Allah 
    be upon him) said: “Whoever gives food to a fasting person with which to 
    break his fast will have a reward like his without detracting from the 
    reward of the fasting person in the slightest.”

    Narrated by al-Tirmidhi, 807 

    What is meant by the fasting person here is any Muslim who is 
    fasting, especially those who are deserving of charity, such as the poor, 
    needy, and wayfarers. This is similar to the words of the Prophet (blessings 
    and peace of Allah be upon him): “Whoever equips a fighter for the sake of 
    Allah has gone out on campaign (i.e., will have the reward of going out on 
    campaign).”

    Narrated by al-Bukhaari, 2843. 

    And Allah is the source of strength. May Allah send blessings 
    and peace upon our Prophet Muhammad and his family and Companions. End quote 
    . 

    Standing Committee fir Academic Research and Issuing Fatwas 

    Fataawa al-Lajnah al-Daa’imah 
    (vol. 2), 9/33 

    For more information please see also the answers to questions 
    no. 50047,
    118145 

    And Allah knows best.