[ALLAH’S Quran – 9:119] “O Ye who believe! fear Allah, and be with the truthful.”

The Prophet (Peace Be Upon Him) has said:
[Bukhari, Book #73, Hadith #116] “Narrated ‘Abdullah: The Prophet said, “Truthfulness leads to righteousness, and righteousness leads to paradise. And a man keeps on telling the truth until he becomes a truthful person. Falsehood leads to Al-Fajur (i.e. wickedness, evil-doing), and Al-Fajur (wickedness) leads to the (Hell) Fire, and a man may keep on telling lies till he is written before Allah, a liar.”

[Muslim, Book #032, Hadith #6309] “Abdullah reported Allah’s Messenger (may peace be upon him) as saying: It is obligatory for you to tell the truth, for truth leads to virtue and virtue leads to Paradise, and the man who continues to speak the truth and endeavors to tell the truth is eventually recorded as truthful with Allah, and beware of telling of a lie for telling of a lie leads to obscenity and obscenity leads to Hell-Fire, and the person who keeps telling lies and endeavors to tell a lie is recorded as a liar with Allah.”

[Malik’s Muwatta, 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.”

[Malik’s Muwatta, Book #56, Hadith #56.7.17] “Malik related to me that he heard that someone said to Luqman, “What has brought you to what we see?” meaning his high rank. Luqman said, “truthful speech, fulfilling the trust, and leaving what does not concern me.”