What is the difference between Lillaah and Sadqah?

Answer

Lillaah is a word used by the ordinary people. It has no technical significance. In our Urf (customary usage) it refers to optional charity which could be used for every kind of charitable work.

Sadqah is of two kinds: Sadqah Waajibah such as Zakaat, Fitrah, Fidyah, Kaffaarah, etc. Sadqah Naafilah (optional charity). This is the same as Lillaah. Sadqah Waajbah may be given to only the Fuqara and Masaakeen.