Musnad Ahmad 30:1559

Yahya narrated to us, Ibn Lahi'ah informed us, from Abu Yunus, from Abu Hurairah, who said: I heard the Prophet, peace and blessings of Allah be upon him, saying: "The people of Paradise, their perspiration is musk, and their fuel is aloeswood." I said to Ibn Lahi'ah: "O Abu Abd al-Rahman, what is aloeswood?" He said: "The good Indian wood."