To grope for s.t. (as in the dark); to put a blind person's hand on his food so he can find it (ma-).
If you want to light a lamp, search for the matches there at the head of your bed.
Allow us to grope around in that fish trap even if just for two large rabbitfish.
With a blind person like that, if his hand isn't set on his food, he won't be able to eat.