I contribute some Lillah money on a monthly basis to the local SANZAF branch.

Question

I contribute some Lillah money on a monthly basis to the local SANZAF branch. This money is used to cook food that is distributed to the needy. My Question — Is it permissible to continue with this monthly Lillah contribution? My intention is to feed the poor. I raise these questions and ask for guidance as I'm concerned that although my intension may be good, I may be actually going against the Sunnah.