462. In the case of sneezing Prophet (ﷺ)'s order #1
Narrated Al-Bara' bin `Azib (RA): Allah's Messenger (ﷺ) ordered us to do seven things and forbade us to do other seven. He ordered us: to follow the funeral procession. to visit the sick, to accept invitations, to help the oppressed, to fulfill the oaths, to return the greeting and to reply to the sneezer: (saying, "May Allah be merciful on you," provided the sneezer says, "All the praises are for Allah,"). He forbade us to use silver utensils and dishes and to wear golden rings, silk (clothes), Dibaj (pure silk cloth), Qissi and Istabraq (two kinds of silk cloths).
Related Duas:
Dua to one who says 'May Allah bless you'
To one who pronounces his love for you, for Allah’s sake
Returning a Dua of forgiveness
Dua of researcher, mufti and truth seeker
Manners in sneezing
The method of giving Salam
Upon receiving pleasing news
Spread of salutations
Dua said at a sitting or gathering etc
Blessings of anger control
To one who has offered you some of his wealth
Dua upon sneezing #1