The Prophet (ﷺ) said, "Allah loves sneezing but dislikes yawning; so if anyone of you sneezes and then praises Allah, every Muslim who hears him (praising Allah) has to say Tashmit to him. But as regards yawning, it is from Satan, so if one of you yawns, he should try his best to stop it, for when anyone of you yawns, Satan laughs at him."
Sahih al-Bukhari Book 78, Hadith 250
← Previous Hadith Two men sneezed before the Prophet (ﷺ) and he said Tashmit to one of them, while he did not say Tashmit to the other. So that man said, "O Allah's Messenger (ﷺ)! You said Tashmit to that fellow but you did not say Tashmit to me. "The Prophet (ﷺ) said, "That man praised Allah, but you did not praise Allah."

Sahih al-Bukhari Book 78, Hadith 249 Next Hadith → The Prophet (ﷺ) said, "Allah created Adam in His picture, sixty cubits (about 30 meters) in height. When He created him, He said (to him), "Go and greet that group of angels sitting there, and listen what they will say in reply to you, for that will be your greeting and the greeting of your offspring." Adam (went and) said, 'As-Salamu alaikum (Peace be upon you).' They replied, 'AsSalamu-'Alaika wa Rahmatullah (Peace and Allah's Mercy be on you) So they increased 'Wa Rahmatullah' The Prophet (ﷺ) added 'So whoever will enter Paradise, will be of the shape and picture of Adam Since then the creation of Adam's (offspring) (i.e. stature of human beings is being diminished continuously) to the present time."

Sahih al-Bukhari Book 79, Hadith 1