The Báb then delivered into his hands a letter He had written to Hájí Mírzá Siyyid ‘Alí, His maternal uncle, in which He had informed him of His safe return to Búshihr. He also entrusted him with a copy of the Khasá’il-i-Sab‘ih, [Literally meaning “The Seven Qualifications”] a treatise in which He had set forth the essential requirements from those who had attained to the knowledge of the new Revelation and had recognised its claim. As He bade Quddús His last farewell, He asked him to convey His greetings to each of His loved ones in Shíráz.
(Chapter 8, ‘The Dawn-Breakers’)