´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. "
Shaykh Dr. Abdur Rahman Freywai
Explanation: 1: The swelling of the rib, which is often fatal.
2: A fragrant yellow-colored grass.
Note: (In the chain of narration, Maymun Abu Abdullah is a weak narrator.)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 2078