Ahmad ibn al-Hasan ibn Ali ibn Faddal, from Amr ibn Saeed, from Imam al-Ridha عليه السلام, said: I (narrator) asked Imam عليه السلام about ‘the fasting person fumigating himself with aloeswood or with something other than that, and the smoke enters his throat.’ Imam عليه السلام said: “It is permissible, there is no harm in it.” He said: “And I asked Imam عليه السلام about ‘the fasting person when dust enters his throat.’” Imam عليه السلام said: “There is no harm.”