I don't agree with the second half of the statement, but even Scripture says something to the same effect.
James 2:16
New International Version (NIV)
16 If one of you says to them, “Go in peace; keep warm and well fed,” but does nothing about their physical needs, what good is it?
If one doesn't have the ability to help, prayer is appreciated, IMO. But do judge what it means to have the ability to help. Most Christians don't think they can help those in need, yet they have cable, unlimited data plans on their phones, go out to the movies instead of waiting for them to show up on Netflix or Redbox or whatever where they could watch them much cheaper if they want to watch them.
You'd be surprised how much you have to help brothers and sisters in need when you cut out the toys. A cell phone, maybe even with some texting, fine. Unlimited data plans when you have internet at home? Is that really necessary?