Al-Matalib al-'Aliyah 2416 — Olive oil

It is narrated from Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said to me: "O Ali! Eat olive oil and apply it (to the body), for whoever anoints himself with olive oil, Satan will not come near him for forty nights."
Al-Harith bin Abi Usamah recorded this hadith in his Musnad; however, its chain contains the narrators Hammad bin Amr and al-Sari bin Khalid, because of whom the scholars of hadith have declared this report severely weak, indeed mawdu' (fabricated).