“And when the foolish address them (with bad words) they reply back with ‘Salamaa’ (peaceful words of gentleness).” (Qur’an, 25:63)

“If they pass by some vain speech or play, they pass by it with dignity.” (Qur’an, 25:72)

“And be moderate in your pace and lower your voice; indeed, the most disagreeable of sounds is the voice of donkeys.” (Qur’an, 31:19)

“And speak nicely to people.” (Qur’an, 2:83)

“When you are greeted with a greeting, greet in return with what is better than it, or (at least) return it equally.” (Qur’an, 4:86)

“And let not those among you who are blessed with graces and wealth swear not to give to their kinsmen, the poor, and those who left their homes for Allah’s cause. Let them pardon and forgive. Do you not wish that Allah should forgive you?” (Qur’an, 24:22)
Abu Bakr (ra) had cut off his financial support of his relative Mustah because Mustah had participated in the slander against his daughter `A’ishah (ra). After this verse was revealed, he resumed and even increased the amount he gave Mustah in financial support.

“Show forgiveness, enjoin what is good, and turn away from the foolish.” (Qur’an, 7:199)