Islam commands Muslims to be of good characters and morals. Also, it asks them to steer clear of all evil traits such as backbiting, telling lies, spreading gossip, etc.

Sheik Yusuf Al-Qaradawi, states: “Gossiping means passing on to others what you hear from someone in such a manner that will cause dissension among people, sour their relationships, or increase already-existing bitterness between them. From the very early Makkah period of revelation, the Qur’an condemned this trait saying, ‘And do not obey any despicable man, ready with oaths, a slanderer, going among the people with calumnies.’ (Al-Qalam: 10-11)
The Prophet (peace and blessings be upon on him) said, ‘The one who spreads gossip which he has overheard will not enter the Garden.’ (Reported by Al-Bukhari and Muslim.), and, ‘The most evil among Allah’s servants are those who go about spreading gossip dividing those who love each other and desiring to defame those who are innocent.’ (Reported by Ahmad)
In order to foster peace and reconciliation, Islam permits a mediator to conceal the bad words said by one person against another and permits him to add some good words which, in fact, neither of them has said. This is not considered to be lying, for the Prophet (peace and blessings be upon him) said, ‘He is not a liar who makes peace between two persons, saying what is good or adding something good.’ (Reported by al-Bukhari and Muslim)
Islam’s anger is particularly directed against those people who, as soon as they hear something bad, hasten to recount it for the sake of currying favour or merely out of love of causing trouble and dissension. Indeed, many such people are not satisfied to simply repeat what they have heard but add to it or invent something of their own.
A man came to `Umar ibn `Abd Al-`Aziz and told him something about another person which the latter would have disliked being mentioned. Thereupon, `Umar said to him, ‘Let us examine your case: If you are lying, you are one of those who is mentioned in the Qur’anic verse, ‘If a wicked person brings you some news, investigate it’ (Al-Hujurat: 6), and if you are telling the truth, you are one of those mentioned in the Qur’anic verse, ‘A slanderer, going among the people with calumnies.’ (Al-Qalam: 11) But if you wish we may forgive you.’ The man replied, ‘Please forgive me, O Commander of the Believers. I shall never do it again.’