Anas b. Malik reported that Messenger of Allah ﷺ was the best amongst people in disposition and behaviour.  

كَانَ رَسُولُ اللَّهِ ﷺ أَحْسَنَ النَّاسِ خُلُقًا  

From As-Sa'b bin Jath-thama Al-Laithi that the latter presented an onager to Messenger of Allah ﷺ while he was at Al-Abwa' or at Waddan, and he refused it. On noticing the signs of some unpleasant feeling of disappointment on his (As-Sab's) face, the Prophet ﷺ said to him, "I have only returned it because I am Muhrim."  

أَنَّهُ أَهْدَى لِرَسُولِ اللَّهِ ﷺ حِمَارًا وَحْشِيًّا وَهْوَ بِالأَبْوَاءِ أَوْ بِوَدَّانَ فَرَدَّهُ عَلَيْهِ فَلَمَّا رَأَى مَا فِي وَجْهِهِ قَالَ إِنَّا لَمْ نَرُدَّهُ عَلَيْكَ إِلاَّ أَنَّا حُرُمٌ  

An onager was presented to Messenger of Allah ﷺ at the place called Al-Abwa' or Waddan, but Allah's Apostle rejected it. When the Prophet ﷺ noticed the signs of sorrow on the giver's face he said, "We have not rejected your gift, but we are in the state of Ihram." (i.e. if we were not in a state of Ihram we would have accepted your gift, Fath-ul-Bari page 130, Vol. 6)  

أَنَّهُ أَهْدَى لِرَسُولِ اللَّهِ ﷺ حِمَارًا وَحْشِيًّا وَهْوَ بِالأَبْوَاءِ أَوْ بِوَدَّانَ فَرَدَّ عَلَيْهِ فَلَمَّا رَأَى مَا فِي وَجْهِهِ قَالَ أَمَا إِنَّا لَمْ نَرُدَّهُ عَلَيْكَ إِلاَّ أَنَّا حُرُمٌ  

I stayed with Messenger of Allah ﷺ for one year. What obstructed me to migrate was (nothing) but (persistent) inquiries from him (about Islam). (It was a common observation) that when anyone of us migrated (to Medina) he ceased to ask (too many questions) from Messenger of Allah ﷺ. So I asked him about virtue and vice. Thereupon Messenger of Allah ﷺ said: Virtue is a kind disposition and vice is what rankles in your mind and that you disapprove of its being known to the people.  

أَقَمْتُ مَعَ رَسُولِ اللَّهِ ﷺ بِالْمَدِينَةِ سَنَةً مَا يَمْنَعُنِي مِنَ الْهِجْرَةِ إِلاَّ الْمَسْأَلَةُ كَانَ أَحَدُنَا إِذَا هَاجَرَ لَمْ يَسْأَلْ رَسُولَ اللَّهِ ﷺ عَنْ شَىْءٍ قَالَ فَسَأَلْتُهُ عَنِ الْبِرِّ وَالإِثْمِ فَقَالَ رَسُولُ اللَّهِ ﷺ الْبِرُّ حُسْنُ الْخُلُقِ وَالإِثْمُ مَا حَاكَ فِي نَفْسِكَ وَكَرِهْتَ أَنْ يَطَّلِعَ عَلَيْهِ النَّاسُ  

The Prophet ﷺ never used bad language neither a "Fahish nor a Mutafahish. He used to say "The best amongst you are those who have the best manners and character." (See Hadith No. 56 (B) Vol. 8)  

لَمْ يَكُنِ النَّبِيُّ ﷺ فَاحِشًا وَلاَ مُتَفَحِّشًا وَكَانَ يَقُولُ إِنَّ مِنْ خِيَارِكُمْ أَحْسَنَكُمْ أَخْلاَقًا  

Abdullah bin 'Amr mentioned Messenger of Allah ﷺ saying that he was neither a Fahish nor a Mutafahish. Abdullah bin 'Amr added, Messenger of Allah ﷺ said, 'The best among you are those who have the best manners and character.'  

دَخَلْنَا عَلَى عَبْدِ اللَّهِ بْنِ عَمْرٍو حِينَ قَدِمَ مَعَ مُعَاوِيَةَ إِلَى الْكُوفَةِ فَذَكَرَ رَسُولَ اللَّهِ ﷺ فَقَالَ لَمْ يَكُنْ فَاحِشًا وَلاَ مُتَفَحِّشًا وَقَالَ قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ مِنْ أَخْيَرِكُمْ أَحْسَنَكُمْ خُلُقًا  

We were sitting with ʿAbdullah bin ʿAmr who was narrating to us (Hadith): He said, "Messenger of Allah ﷺ was neither a Fahish nor a Mutafahhish, and he used to say, 'The best among you are the best in character (having good manners)."'  

لَمْ يَكُنْ رَسُولُ اللَّهِ ﷺ فَاحِشًا وَلاَ مُتَفَحِّشًا وَإِنَّهُ كَانَ يَقُولُ إِنَّ خِيَارَكُمْ أَحَاسِنُكُمْ أَخْلاَقًا  

"Nothing is heavier on the believer's Scale on the Day of Judgment than good character. For indeed Allah, Most High, is angered by the shameless obscene person."  

أَنَّ النَّبِيَّ ﷺ قَالَ مَا شَيْءٌ أَثْقَلُ فِي مِيزَانِ الْمُؤْمِنِ يَوْمَ الْقِيَامَةِ مِنْ خُلُقٍ حَسَنٍ وَإِنَّ اللَّهَ لَيَبْغَضُ الْفَاحِشَ الْبَذِيءَ  

The Messenger of Allah was asked about that for which people are admitted into Paradise the most and he said, "Conciousness of Allah, and good character." And he was asked about that for which people are admitted into the Fire the most, and he said, "The mouth and the private parts."  

سُئِلَ رَسُولُ اللَّهِ ﷺ عَنْ أَكْثَرِ مَا يُدْخِلُ النَّاسَ الْجَنَّةَ فَقَالَ «تَقْوَى اللَّهِ وَحُسْنُ الْخُلُقِ۔» وَسُئِلَ عَنْ أَكْثَرِ مَا يُدْخِلُ النَّاسَ النَّارَ فَقَالَ: «الْفَمُ وَالْفَرْجُ۔»  

The Messenger of Allah ﷺ said: By his good character a believer will attain the degree of one who prays during the night and fasts during the day.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ إِنَّ الْمُؤْمِنَ لَيُدْرِكُ بِحُسْنِ خُلُقِهِ دَرَجَةَ الصَّائِمِ الْقَائِمِ  

The Prophet ﷺ said: I guarantee a house in the surroundings of Paradise for a man who avoids quarrelling even if he were in the right, a house in the middle of Paradise for a man who avoids lying even if he were joking, and a house in the upper part of Paradise for a man who made his character good.  

قَالَ رَسُولُ اللَّهِ ﷺ أَنَا زَعِيمٌ بِبَيْتٍ فِي رَبَضِ الْجَنَّةِ لِمَنْ تَرَكَ الْمِرَاءَ وَإِنْ كَانَ مُحِقًّا وَبِبَيْتٍ فِي وَسَطِ الْجَنَّةِ لِمَنْ تَرَكَ الْكَذِبَ وَإِنْ كَانَ مَازِحًا وَبِبَيْتٍ فِي أَعْلَى الْجَنَّةِ لِمَنْ حَسَّنَ خُلُقَهُ  

"Indeed the most beloved among you to me, and the nearest to sit with me on the Day of Judgment is the best of you in character. And indeed, the most disliked among you to me, and the one sitting furthest from me on the Day of Judgement are the tharthārūn (overbearingly talkative), and the mutashaddiqūn (scandal spreaders) and the muthafayhiqūn." They said: "O Messenger of Allah! We know about the tharthārūn, and the mutashaddiqūn, but what about the muthafayhiqūn?"' He said:"The arrogant."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّ مِنْ أَحَبِّكُمْ إِلَىَّ وَأَقْرَبِكُمْ مِنِّي مَجْلِسًا يَوْمَ الْقِيَامَةِ أَحَاسِنَكُمْ أَخْلاَقًا وَإِنَّ أَبْغَضَكُمْ إِلَىَّ وَأَبْعَدَكُمْ مِنِّي مَجْلِسًا يَوْمَ الْقِيَامَةِ الثَّرْثَارُونَ وَالْمُتَشَدِّقُونَ وَالْمُتَفَيْهِقُونَ قَالُوا يَا رَسُولَ اللَّهِ قَدْ عَلِمْنَا الثَّرْثَارُونَ وَالْمُتَشَدِّقُونَ فَمَا الْمُتَفَيْهِقُونَ قَالَ الْمُتَكَبِّرُونَ