What are hadiths about truthfulness (speaking the truth at all times)? Examples of hadiths about truthfulness (speaking the truth at all times)…
According to Abu Hurayra (ra), the Messenger of Allah (saw) said, “One cannot have faith and unbelief, truth and lie, betrayal and trustworthiness in his heart at the same time.” (Ibn Hanbal, II, 349)
Abu al-Hawraʾ al-Saʿdi (ra) said, “I remember that the Messenger of Allah (saw) said, ‘Leave what makes you feel in doubt for what does not make you feel in doubt. The truth brings tranquility while falsehood sows doubt.’” (al-Tirmidhi, al-Sıfat al-Qiyama, 60)
According to Abu Hurayra (ra), the Messenger of Allah (saw) said, “It is enough sin for a man to relate everything he hears.” (Abu Daʾud, al-Adab, 80)
Sufyan b. Asid al-Hadrami (ra) heard the Messenger of Allah (saw) say, “It is a great treachery that you should tell your brother something and have him believe you when you are lying.” (Abu Daʾud, al-Adab, 71)
As related from ʿAbd Allah b. Masʿud (ra), the Messenger of Allah (saw) said, “I urge you to stick to the truth! For telling the truth is a virtue and virtue leads to Paradise and the servant who endeavors to tell the truth is recorded as truthful. I urge you to stay away from lying! For lying is an obscenity and obscenity leads to the Hell fire, and the servant who endeavors to tell a lie is recorded as a liar.” (Muslim, al-Birr, 105)
Source: Presidency Of Religious Affairs The Turkey, Islam Through Hadiths
Hadiths About Speaking Is Responsibility