Allah likes sneezing but dislikes yawning. So when one of you yawns, he should restrain it as much as possible, and should not say Ha, Ha, for that is from the devil who laughs at him.  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ اللَّهَ يُحِبُّ الْعُطَاسَ وَيَكْرَهُ التَّثَاؤُبَ فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَلْيَرُدَّهُ مَا اسْتَطَاعَ وَلاَ يَقُلْ هَاهْ هَاهْ فَإِنَّمَا ذَلِكُمْ مِنَ الشَّيْطَانِ يَضْحَكُ مِنْهُ  

that the Messenger of Allah ﷺ said: "The sneeze is from Allah and the yawn is from Ash-Shaitan. So when one of you yawns let him cover his mouth with his hand. For when he says 'Ah, Ah' Ash-Shaitan laughs from inside his opening." [And indeed Allah loves the sneeze and He dislikes the Yawn, so when a man says Ah, Ah when yawning, indeed Ash-Shaitan laughs from inside his opening."]  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْعُطَاسُ مِنَ اللَّهِ وَالتَّثَاؤُبُ مِنَ الشَّيْطَانِ فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَلْيَضَعْ يَدَهُ عَلَى فِيهِ وَإِذَا قَالَ آهْ آهْ فَإِنَّ الشَّيْطَانَ يَضْحَكُ مِنْ جَوْفِهِ وَإِنَّ اللَّهَ يُحِبُّ الْعُطَاسَ وَيَكْرَهُ التَّثَاؤُبَ فَإِذَا قَالَ الرَّجُلُ آهْ آهْ إِذَا تَثَاءَبَ فَإِنَّ الشَّيْطَانَ يَضْحَكُ فِي جَوْفِهِ  

Allah likes sneezing but dislikes yawning. So when one of you yawns, he should restrain it as much as possible, and should not say Ha, Ha, for that is from the devil who laughs at him. (Using translation from Abū Dāʾūd 5028)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِنَّ اللهَ يُحِبُّ الْعُطَاسَ وَيَكْرَهُ التَّثَاؤُبَ فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَقَالَ هَاهْ فَإِنَّ ذَلِكَ شَيْطَانٌ يَضْحَكُ مِنْ جَوْفِهِ  

[Machine] From the Prophet ﷺ, he said, "Indeed, Allah loves the sneeze and dislikes yawning. So when one of you sneezes, let him control it as much as possible or let him cover his mouth with his hand. Because when one yawns, and says 'ahhh', it is only Shaytan who laughs from within him."  

عَنِ النَّبِيِّ ﷺ قَالَ «إِنَّ اللَّهَ يُحِبُّ الْعُطَاسَ وَيَكْرَهُ التَّثَاؤُبَ فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَلْيَكْظِمْ مَا اسْتَطَاعَ أَوْ لِيَضَعَ يَدَهُ عَلَى فِيهِ فَإِنَّهُ إِذَا تَثَاءَبَ فَقَالَ آهْ فَإِنَّمَا هُوَ الشَّيْطَانُ يَضْحَكُ مِنْ جَوْفِهِ»  

[Machine] The Messenger of Allah ﷺ said, "Sneezing is from Allah and yawning is from Satan. So, when one of you yawns, do not say 'Haah, haah,' for indeed Satan laughs in his belly."  

قَالَ رَسُولُ اللهِ ﷺ الْعُطَاسُ مِنَ اللهِ وَالتَّثَاؤُبُ مِنَ الشَّيْطَانِ فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَلَا يَقُلْ هَاهْ هَاهْ فَإِنَّ الشَّيْطَانَ يَضْحَكُ فِي جَوْفِهِ  

"إِنَّ الله ﷻ يُحبُّ الْعُطَاسَ، ويَكْرَهُ التَّثاؤُبَ. فَإِذا تثاوبَ أَحَدُكُمْ فَليَكْظِمْ ما اسْتطَاع، أوْ ليَضَعْ يَدَهُ عَلَى فِيهِ فَإِذا تَثَاوَبَ فَقَال: آه. فَإِنَّما هو الشَّيطانُ يَضْحَكُ مِنْ جوْفه".