Sayyiduna Abdullah (ibn Mas'ud) (may Allah be pleased with him) narrates from the Prophet (peace and blessings of Allah be upon him) that he said: "A believer is neither one who taunts, nor one who curses, nor one who uses obscene language, nor one who abuses."

Sayyiduna Abu Huraira (may Allah be pleased with him) narrates from the Prophet (peace and blessings of Allah be upon him) that he (peace be upon him) said: "A two-faced person is not worthy of being trustworthy."

It is narrated from Sayyiduna Abdullah (ibn Mas'ud) رضي الله عنه that he said: Among the morals of a believer, the most blameworthy is idle talk.

It is narrated from Sayyiduna Abu Darda (may Allah be pleased with him) that he said: The Prophet (peace and blessings of Allah be upon him) said: "Those who curse will neither be witnesses nor intercessors on the Day of Resurrection."

Sayyiduna Abu Hurairah (may Allah be pleased with him) said that the Prophet (peace and blessings of Allah be upon him) said: "It is not befitting for a truthful person to be one who curses."

It is narrated from Sayyiduna Hudhaifah (may Allah be pleased with him) that he said: Whenever any people invoke a curse, the curse falls upon them.

It is narrated from Sayyidah Aisha (may Allah be pleased with her) that Sayyiduna Abu Bakr (may Allah be pleased with him) cursed one of his slaves, so the Prophet (peace and blessings of Allah be upon him) said: "O Abu Bakr! One who curses and also the Siddiq? Never!" By the Lord of the Ka'bah! The Prophet (peace and blessings of Allah be upon him) said this two or three times. Upon this, Sayyiduna Abu Bakr (may Allah be pleased with him) freed one of his slaves that day, and afterwards, he presented himself before the Prophet (peace and blessings of Allah be upon him) and said: I will not do this again.

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he said that it was said to the Messenger of Allah (peace and blessings of Allah be upon him): O Messenger of Allah! Pray against the polytheists. He replied: "I was not sent as one who curses, rather I was sent as a mercy."

It is narrated from Hammam that we were with Hudhaifah, and it was said to Hudhaifah that a man conveys people's words to Sayyiduna Uthman (may Allah be pleased with him). So Hudhaifah said: I heard the Prophet (peace and blessings of Allah be upon him) say: "The tale-bearer will not enter Paradise."

It is narrated from Sayyidah Asma bint Yazid (may Allah be pleased with her) that she said: The Prophet (peace and blessings of Allah be upon him) said:“Shall I not tell you who are the best among you?”The people said: Yes. He said:“Those people who, when they are seen, Allah is remembered.”He said:“Shall I not tell you who are the worst among you?”The people said: Yes. He said:“Those who spread gossip, those who create discord among friends, and those who seek out faults in innocent people (seekers of sins).”