Jami` at-Tirmidhi Book 43, Hadith 13
"You are suffering from a cold." (A chain to support that)
Shu'bah reported this Hadith from 'Ikrimah bin 'Ammar and it is similar to the narration of Yahya bin Sa'eed. (A chain to support that).
from his mother, from her father, who said: "The Messenger of Allah (ﷺ) said: 'Reply three times to the sneezing person. If he (sneezes) more, then if you wish reply and if you do not then do not.'"