الكافي- ط الاسلامية, volume 6, page 334

9. A number of our people have narrated from Ahmad ibn abu ‘Abd Allah from a number of his people from Ali ibn Asbat from Yahya ibn Bashir al-Nabbal who has said the following: “Abu ‘Abd Allah (a.s.), once said to my father, ‘O Bashir, with what do you treat your people for illnesses?’ he replied, ‘It is those bitter medicines.’ He (the Imam) said, ‘When any of you becomes ill take white sugar, make it into powder, pour cold water on it and make him drink it. The One who has made cure in bitter things has the power to make it in the sweet things also.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

10. A number of our people have narrated from Sahl ibn Ziyad from Yasar who has said the following: “Al-Rida’ (a.s.), has said, ‘The sugar chipped with a small hammer dissolves phlegm entirely.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

11. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn Ahmad ibn ‘Ushaym from certain persons of his people who has said the following: “Someone in our family had a fever and physicians had prescribed al-ghafith (a certain herb) and we made the patient to drink it, but it did not benefit him I then complained against it before abu ‘Abd Allah (a.s.), and he (the Imam) said, ‘Allah has not placed cure in anything which is bitter (only). Take one or one and a half piece of sugar in a bowl and pour water on it. Rub it with your hand and make the patient drink it. In the second night make it two and a half pieces of sugar, dissolve it and make the patient to drink. In the third night make it three and a half pieces and dissolve it as before.’ He (the narrator) has said, ‘I followed the instruction and Allah, most Majestic, most Glorious, granted cure to our patient.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.