Of Great Moral Character
Almighty Allah said (translation):
“And indeed, you [O Muhammad] are of a great moral character.”
[Quran, Surat Al-Qalam(68):4]
Foul Language
Abu-Darda (may Allah be pleased with him) reported:
The Prophet (may Allah’s peace be upon him) said:
“Nothing will be heavier on the Day of Resurrection in the Scale of the believer than good manners. Allah hates one who utters foul or coarse language.”
[At- Tirmidhi; Book 1, hadith 626]
Be Grateful
Almighty Allah said (translation):
“And We (Allah) had certainly given Luqman wisdom [and said], “Be grateful to Allah.” And whoever is grateful is grateful for [the benefit of] himself. …”
[Quran, Surat Luqmān(31):12 (partial)]
Health and Free Time
Narrated Ibn ‘Abbas (may Allah be pleased with him):
The Prophet (may Allah’s peace be upon him) said:
“There are two blessings which many people lose: (They are) Health and free time for doing good.”
[Sahih Bukhari; Volume 8, Book 76, #421]
Lower Your Voice
Almighty Allah said (translation):
“And be moderate (or show no insolence) in your walking, and lower your voice. Verily, the harshest of all voices is the voice (braying) of the ass.”
[Quran, Surat Luqmān(31):19]
Walk Easily
Almighty Allah said (translation):
“And the servants of the Most Merciful are those who walk upon the earth easily, and when the ignorant address them [harshly], they say [words of] peace.”
[Quran, Surat Al-Furqān(25):63]
Pride and Insolence
Almighty Allah said (translation):
“And turn not your face away from men with pride, nor walk in insolence through the earth. Verily, Allah likes not each arrogant boaster.”
[Quran, Surat Luqmān(31):18]
Walk Not with Arrogance
Almighty Allah said (translation):
And walk not on the earth with conceit and arrogance. Verily, you can neither rend nor penetrate the earth, nor can you attain a stature like the mountains in height.
[Quran, Surat Al-‘Isrā'(17):37]
Importance of Manners
Sufyân Al-Thawrî (may Allah have mercy on him):
“A man who wanted to write hadîth would [learn] manners and worship for twenty years before starting.”
[Abû Nu’aym, Hilyatu Al-Awliya, 6:361]
Lack of manners despite having knowledge is the most despicable thing in a person. Good manners plough the heart to make way for the seeds of knowledge to be placed. But terrible manners burn the trees of knowledge planted in one’s heart one by one without one realizing.
Source:
http://urwatulwuthqa.wordpress.com/2012/06/05/learning-manners-and-worship/
Muslim Manners 