Two men sneezed before the Prophet. The Prophet (ﷺ) said to one of them, "May Allah bestow His Mercy on you," but he did not say that to the other. On being asked (why), the Prophet (ﷺ) said, "That one praised Allah (at the time of sneezing), while the other did not praise Allah."
Sahih al-Bukhari Book 78, Hadith 245
← Previous Hadith The Prophet (ﷺ) forbade the throwing of stones (with the thumb and the index or middle finger), and said "It neither hunts a game nor kills (or hurts) an enemy, but it gouges out an eye or breaks a tooth."

Sahih al-Bukhari Book 78, Hadith 244 Next Hadith → The Prophet (ﷺ) ordered us to do seven (things) and forbade us from seven (other things): He ordered us to pay a visit to the sick, to follow funeral possessions, to say: May Allah be merciful to you to a sneezer, - if he says: Praise be to Allah, to accept invitation (invitation to a wedding banquet), to return greetings, to help the oppressed, and to help others to fulfill their oaths (provided it was not sinful). And he forbade us from seven (things): to wear golden rings or golden bangles, to wear silk (cloth), Dibaj, Sundus and Mayathir.

Sahih al-Bukhari Book 78, Hadith 246