Kitáb-i-ʻAhd
The Kitáb-i-ʻAhd (Arabic: ﻛﺘﺎﺏ ﻋﻬﺪﻱ literally "Book of My Covenant") is the Will and Testament of Baháʼu'lláh, the founder of the Baháʼí Faith, where he selects his son ʻAbdu'l-Bahá as his successor. It was written at least one year before Baháʼu'lláh died in 1892. An English translation is included in the Tablets of Baháʼu'lláh Revealed After the Kitáb-i-Aqdas, published in 1978.
While the Tablet of the Branch, composed in the Adrianople period had clearly signaled a high station for "the Branch of Holiness" and the Kitáb-i-Aqdas has specified that this high station involved leadership of the Baháʼí community after Baháʼu'lláh's passing, it was only with the unsealing of the Kitáb-i-ʻAhd after the passing of Baháʼu'lláh in 1892 that it was confirmed that the Branch referred to was indeed ʻAbdu'l-Bahá.