Lying

In another passage He saith: “Woe to every lying sinner, who heareth the verses of God recited to him, and then, as though he heard them not, persisteth in proud disdain! Apprise him of a painful punishment.” The implications of this verse, alone, suffice all that is in heaven and on earth, were the people to ponder the verses of their Lord. For thou hearest how in this day the people disdainfully ignore the divinely-revealed verses, as though they were the meanest of all things. And yet, nothing greater than these verses hath ever appeared, nor will ever be made manifest in the world! Say unto them: “O heedless people! Ye repeat what your fathers, in a bygone age, have said. Whatever fruits they have gathered from the tree of their faithlessness, the same shall ye gather also. Ere long shall ye be gathered unto your fathers, and with them shall ye dwell in the hellish fire. An ill abode! The abode of the people of tyranny."

Bahá’u’lláh, Ki tab-i-Iqan, pp. 206-207

The tongue is the witness of My truth, do not pollute it with untruthfulness.

Bahá’u’lláh, Bahá’í Scriptures, p. 133

. . . falsehood, cruelty and treachery [are all torments]. All the imperfections are torments, but they are subtle torments. Certainly for an intelligent man death is better than sin, and a cut tongue is better than lying or calumny.

‘Abdu’l-Bahá, Some Answered Questions, p. 265

Certainly for an intelligent man death is better than sin, and a cut tongue is better than lying or calumny.

‘Abdu’l-Bahá, Some Answered Questions, p. 265

Consider that the worst of qualities and most odious of attributes, which is the foundation of all evil, is lying. No worse or more blameworthy quality than this can be imagined to exist; it is the destroyer of all human perfections, and the cause of innumerable vices. There is no worse characteristic than this; it is the foundation of all evils.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 320

If a doctor consoles a sick man by saying: "Thank God you are better, and there is hope of your recovery," though these words are contrary to the truth, yet they may become the consolation of the patient and the turning-point of the illness. This is not blameworthy.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 320