4-67 Ali ibn Ahmad ibn Musa - may God be pleased with him - narrated that Ahmad ibn Yahya ibn Zakariya al-Qat’tan quoted Bakr ibn Abdullah ibn Habib, on the authority of Uthman ibn Ubayd, on the authority of Hodbat ibn Khalid al-Qaysi, on the authority of Mobarak ibn Fuzalat, on the authority of Al-Asbaq ibn al-Nobatat that the Commander of the Faithful Ali ibn Abi Talib (MGB) told his son Al-Hassan (MGB), “O my dear son! I will teach you four things by which you become needless of any medication.” He (MGB) said, “O Commander of the Faithful! Yes.” The Commander of the Faithful (MGB) said, “Never eat unless you are not hungry. Stop eating while you are still hungry; chew everything you eat very well; go to the toilet before going to bed. If you follow these instructions you will never need any medication.”