It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him) that he said: I heard the Prophet of Allah (peace and blessings be upon him) describing olive oil and wars as a remedy for dhat al-janb (pleurisy). Qatadah said: (The way to use it is that) it is poured into the mouth from the side on which there is pain. This hadith has a high (ali) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.