Mírzá Mihdí (Mehdí) was Bahá’u’lláh’s youngest son. Born in Iran in 1848, he was a gentle child that loved his Father very much. From a young age, he accompanied his Father on His exile without complaints or requests.
His life was the perfect example of complete detachment and unconditional love.
“To the galling weight of these tribulations was now added the bitter grief of a sudden tragedy — the premature loss of the noble, the piousMírzá Mihdí, the Purest Branch, ‘Abdu’l-Bahá’s twenty-two year old brother, an amanuensis of Bahá’u’lláh and a companion of His exile from the days when, as a child, he was brought from Tihran to Baghdad to join his Father after His return from Sulaymaniyyíh. He was pacing the roof of the barracks in the twilight, one evening, wrapped in his customary devotions, when he fell through the unguarded skylight onto a wooden crate, standing on the floor beneath, which pierced his ribs, and caused, twenty-two hours later, his death, on the 23rd of Rabi’u’l-Avval 1287 A.H. (June 23, 1870). His dying supplication to a grieving Father was that his life might be accepted as a ransom for those who were prevented from attaining the presence of their Beloved.
In a highly significant prayer, revealed by Bahá’u’lláh in memory of His son — a prayer that exalts his death to the rank of those great acts of atonement associated with Abraham’s intended sacrifice of His son, with the crucifixion of Jesus Christ and the martyrdom of the Imam Husayn — we read the following: “I have, O my Lord, offered up that which Thou hast given Me, that Thy servants may be quickened, and all that dwell on earth be united.” And, likewise, these prophetic words, addressed to His martyred son: “Thou art the Trust of God and His Treasure in this Land. Erelong will God reveal through thee that which He hath desired.”
After he had been washed in the presence of Bahá’u’lláh, he “that was created of the light of Bahá,” to whose “meekness” the Supreme Pen had testified, and of the “mysteries” of whose ascension that same Pen had made mention, was borne forth, escorted by the fortress guards, and laid to rest, beyond the city walls, in a spot adjacent to the shrine of Nabi Salih, from whence, seventy years later, his remains, simultaneously with those of his illustrious mother, were to be translated to the slopes of Mt. Carmel, in the precincts of the grave of his sister, and under the shadow of the Báb’s holy sepulcher.”
(Shoghi Effendi, God Passes By, p. 188)