الكافي- ط الاسلامية, volume 6, page 379

5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from certain persons of his people from Ibrahim ibn Ibrahim ibn abu al-Balad who have said the following: “Al-‘ Abbas ibn Musa took me and commanded to hit my mouth, so my teeth became shaky and I could not chew food. I then saw my father in my dream. There was an old man with him whom I could not recognize. My father, may Allah grant him mercy, said to me to offer greeting of peace to him.’ I then asked, ‘Father, who is he?’ He replied, ‘He is abu Shaybah al-Khurasaniy (of companions of abu Ja‘far (a.s.)).’ I offered him greeting of peace and he asked, ‘Why do I see you in this condition?’ I replied, ‘Sinful al-‘Abbas ibn Musa commanded to hit on my mouth and my teeth have become shaky.’ He said, ‘Tie them down with cyperus.’ In the morning I rinsed my teeth with al-Sa‘d and my teeth calmed down.’”

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

6. It is narrated from the narrator of the previous Hadith from ibn Mahbub from abu Wallad who has said the following: “I once saw abu al-Hassan sitting in al-Hijr (near al-Ka‘bah) along with a group of his family members and I heard him saying, ‘I had a toothache so I took cyperus and rubbed with it my teeth, it benefited me and the pain calmed down.’”

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