Anger

Jealousy consumeth the body and anger doth burn the liver: avoid these two as you would a lion.

Bahá’u’lláh, The Compilation of Compilations vol. I, p. 460

Well is it with the king who keepeth a tight hold on the reins of his passion, restraineth his anger and preferreth justice and fairness to injustice and tyranny.

Bahá’u’lláh, Tablets of Bahá’u’lláh, p. 65

...think ye of hostility and hatred as the torments of hell.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, pp. 243-246

Be not the slave of your moods, but their master. But if you are so angry, so depressed and so sore that your spirit cannot find deliverance and peace even in prayer, then quickly go and give some pleasure to someone lowly or sorrowful, or to a guilty or innocent sufferer! Sacrifice yourself, your talent, your time, your rest to another, to one who has to bear a heavier load than you.

‘Abdu’l-Bahá, source unknown

Count annoyance and hostility as the torment of hell-fire.

‘Abdu’l-Bahá, Bahá’í World, p. 356

For example, from the beginning of his life you can see in a nursing child the signs of desire, of anger, and of temper.

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