467. Etiquette in yawn
Allah's Messenger (ﷺ) said: When one of you yawns, he should keep his mouth shut with the help of his hand, for it is the devil that enters therein.
ReferenceMuslim: 2995
Related Duas:
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Dua upon sneezing #3
Dua said at a sitting or gathering etc
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Dua to one who says 'May Allah bless you'
Dua for Allah's response and forgiveness
Dua upon sneezing #2
To one who pronounces his love for you, for Allah’s sake
Dua upon sneezing #4
Returning a greeting to a kaafir