In The Name Of Allah Most Gracious Most Merciful
Assalaamu alaykum wa rahmatuallahi wa barakatuhu
Assalamau alaykum wa rahmatullahi wa barakatuhu
33:70. O you who believe! Keep your duty to Allâh and fear Him, and speak (always) the truth.
22:30. That (Manâsik prescribed duties of Hajj is the obligation that mankind owes to Allâh), and whoever honours the sacred things of Allâh, then that is better for him with his Lord. The cattle are lawful to you, except those (that will be) mentioned to you (as exceptions). So shun the abomination (worshipping) of idol, and shun lying speech (false statements)
26:221. Shall I inform you (O people!) upon whom the Shayâtin (devils) descend?
222. They descend on every lying (one who tells lies), sinful person.
8:27. O you who believe! Betray not Allâh and His Messenger, nor betray knowingly your Amânât (things entrusted to you, and all the duties which Allâh has ordained for you).
Malik :: Book 56 : Hadith 56.7.16
Malik related to me that he heard that Abdullah ibn Masud used to say, "You must tell the truth. Truthfulness leads to right action. Right action leads to the Garden. Beware of lying. Lying leads to corruption, and corruption leads to the Fire. Don't you see that it is said, 'He speaks the truth and acts rightly,' and, 'He lies and is corrupt.' "
General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 4953
Narrated Sufyan ibn Asid al-Hadrami:
I heard the Apostle of Allah (peace_be_upon_him) say: It is great treachery that you should tell your brother something and have him believe you when you are lying.
General Behavior (Kitab Al-Adab)
Dawud :: Book 41 : Hadith 4782
The Prophet (peace_be_upon_him) 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.
Bukhari :: Book 1 :: Volume 8 :: Hadith 386
Narrated Anas bin Malik:
Allah's Apostle said, "Whoever prays like us and faces our Quibla and eats our slaughtered animals is a Muslim and is under Allah's and His Apostle's protection. So do not betray Allah by betraying those who are in His protection."
Laws of Inheritance (Al-Faraa'id)
Bukhari :: Book 8 :: Volume 80 :: Hadith 747
We have no Book to recite except the Book of Allah (Qur'an) and this paper. Then 'Ali took out the paper, and behold ! There was written in it, legal verdicts about the retaliation for wounds, the ages of the camels (to be paid as Zakat or as blood money). In it was also written: 'Medina is a sanctuary from Air (mountain) to Thaur (mountain). So whoever innovates in it an heresy (something new in religion) or commits a crime in it or gives shelter to such an innovator, will incur the curse of Allah, the angels and all the people, and none of his compulsory or optional good deeds will be accepted on the Day of Resurrection. And whoever (a freed slave) takes as his master (i.e. be-friends) some people other than hi real masters without the permission of his real masters, will incur the curse of Allah, the angels and all the people, and none of his compulsory, or optional good deeds will be accepted on the Day of Resurrection. And the asylum granted by any Muslim is to be secured by all the Muslims, even if it is granted by one of the lowest social status among them; and whoever betrays a Muslim, in this respect will incur the curse of Allah, the angels, and all the people, and none of his Compulsory or optional good deeds will be accepted on the Day of Resurrection."
Good Manners and Form (Al-Adab)
Bukhari :: Book 8 :: Volume 73 :: Hadith 117
Narrated Abu Huraira:
Allah's Apostle said, "The signs of a hypocrite are three: Whenever he speaks, he tells a lie; and whenever he promises, he breaks his promise; and whenever he is entrusted, he betrays (proves to be dishonest)".
The Book on Government (Kitab Al-Imara)
Muslim :: Book 20 : Hadith 4673
It has been narrated on the authority of Sulaimin b. Buraida who learnt the tradition from his father. The latter said that the Messenger of Allah (may peace be upon him) said: The sanctity of the wives of Mujahids is like the sanctity of their mothers for those who sit at home (i. e do not go out for Jihad). Anyone who stays behind looking after the family of a Mujahid and betrays his trust will be made to stand on the Day of judgment before the Mujahid who will take away from his meritorious deeds whatever he likes. So what do you think (will he leave anything)?