Volume 3, Book 28, Number 43:
Narrated ‘Abdullah bin Ma’qal:
I sat with Ka’b bin ‘Ujra and asked him about the Fidya. He replied, “This revelation was revealed
concerning my case especially, but it is also for you in general. I was carried to Allah’s Apostle and
the lice were falling in great number on my face. The Prophet said, “I have never thought that your
ailment (or struggle) has reached to such an extent as I see. Can you afford a sheep?” I replied in the
negative. He then said, “Fast for three days, or feed six poor persons each with half a Sa of food.” (1 Sa
= 3 Kilograms approx.)