Their deeds, alone, testify to the truth of their words.

A gathering of NSA of Iran and LSA of Tehran in 1981
Most of them were kidnapped and executed.

In this most resplendent Dispensation, however, this most mighty Sovereignty, a number of illumined divines, of men of consummate learning, of doctors of mature wisdom, have attained unto His Court, drunk the cup of His divine Presence, and been invested with the honor of His most excellent favor. They have renounced, for the sake of the Beloved, the world and all that is therein….

All these were guided by the light of the Sun of Divine Revelation, confessed and acknowledged His truth. Such was their faith, that most of them renounced their substance and kindred, and cleaved to the good pleasure of the All-Glorious. They laid down their lives for their Well-Beloved, and surrendered their all in His path. Their breasts were made targets for the darts of the enemy, and their heads adorned the spears of the infidel. No land remained which did not drink the blood of these embodiments of detachment, and no sword that did not bruise their necks. Their deeds, alone, testify to the truth of their words.
Doth not the testimony of these holy souls, who have so gloriously risen to offer up their lives for their Beloved that the whole world marveled at the manner of their sacrifice, suffice the people of this day?
Is it not sufficient witness against the faithlessness of those who for a trifle betrayed their faith, who bartered away immortality for that which perisheth, who gave up the Kawthar of the Divine Presence for salty springs, and whose one aim in life is to usurp the property of others?
Even as thou dost witness how all of them have busied themselves with the vanities of the world, and have strayed far from Him Who is the Lord, the Most High.

Gleanings From the Writings of Bahá’u’lláh P.181