Should he sponsor orphans or the elderly?
Question

                The prophet says: “the one who sponsors an orphan child and I are like these two in paradise” I have asked in the masjid about the needy people, and I knew that there is who is more needy than orphans, who are the poor elderly. There is among them who does not have tomorrow’s living, and of them who became blind or very weak, they do not have any provider, they are also orphans but orphans who did not lose parents, they are orphans who lost sons, daughters and providers. I feel so sad for then but wish to be in the company of the prophet (PBUH) in paradise. Many people help orphans, and my heart is broken for those forgotten elderly people. What shall I do? May Allah reward you!.
Praise be to Allah.Sponsoring the elderly and 
    relieving them of harm is a communal obligation (fard kifaayah). They should 
    be provided with a life of dignity and they must be given all human rights 
    in full. Undoubtedly there is much good in doing that to seek the pleasure 
    of Allaah, and whatever you spend on their care will be recorded with 
    multiple reward, in sha Allaah. Allaah says (interpretation of the 
    meaning): 
“The likeness of those 
    who spend their wealth in the way of Allaah, is as the likeness of a grain 
    (of corn); it grows seven ears, and each ear has a hundred grains. Allaah 
    gives manifold increase to whom He wills. And Allaah is All-Sufficient for 
    His creatures’ needs, All-Knower”
[al-Baqarah 2:261]
Moreover, by doing this you 
    are relieving distress and hardship, and helping a Muslim brother, and the 
    Messenger of Allaah  (peace and blessings of Allaah be upon him) 
    encouraged that when he said: “Whoever removes a worldly hardship from a 
    believer, Allaah will remove one of the hardships of the Day of Resurrection 
    from him. Whoever grants respite to (a debtor) who is in difficulty, Allaah 
    will grant him relief in this world and in the Hereafter. Whoever conceals 
    (the fault of) a Muslim in this world, Allaah will conceal him (his faults) 
    in this world and in the Hereafter. Allaah will help a person so long as he 
    is helping his brother.” 
Narrated by Muslim (4867).  
     
Undoubtedly the reward for 
    sponsoring an orphan is great, but a person should nevertheless give 
    priority in charitable giving to those whose poverty and need are greater. 
    An orphan may have wealth from which he may spend, or he may have a rich 
    person who spends on him, so someone else, who has no wealth and no one to 
    spend on him, may be more deserving of charity and help, and that may bring 
    more reward, in sha Allaah, than spending on an orphan. 
Shaykh Ibn ‘Uthaymeen (may 
    Allaah have mercy on him) said, after mentioning the eight types of people 
    who are entitled to zakaah: 
If it is said: who is most 
    deserving of zakaah funds out of these eight categories? 
We say: The one who is most 
    deserving is the one whose need is greatest, because all of them meet that 
    description, so the one whose need is greatest is most entitled to it. In 
    most cases the ones who are in greatest need are the poor and needy, hence 
    Allaah started with them when He said (interpretation of the meaning): 
    “As-Sadaqaat (here it means Zakaah) are only for the Fuqaraa’ (poor), and 
    Al‑Masaakeen (the poor)” [al-Tawbah 9:60]. End quote. 
Majmoo’ Fataawa Ibn 
    ‘Uthaymeen (18/339). 
And Allaah knows best.