Qatadah narrated from Abu 'Abdullah that Zaid bin Arqam said:
"The Prophet (S.A.W) would acclaim oil and Wars for (the treatment of) pleurisy." Qatadah said: "And it is put in the mouth on the side which he is suffering. " (DE)
English reference (DE): Vol. 4, Book 2, Hadith 2078 (DE)
Arabic reference (DE): Book 28, Hadith 2222 (DE)