Before BahÃ ` u 'll Ã h said he had a message from God , he was a member of the religion that was started by the BÃ b. He became very famous among the BÃ bÃ s. When the BÃ b was killed , some BÃ bÃ s got very angry and tried to kill the king of Persia , even though BahÃ ` u 'll Ã h told them not to kill him . When the Babis were caught , the government put many BÃ bÃ s in jail , including BahÃ ` u 'll Ã h. While in jail at Tehran , BahÃ ` u 'll Ã h said he saw an angel that he called the `` maid of heaven '' . In the BahÃ ' Ã Faith , the star is known as the Haykal , and it was initiated and established by the BÃ b. Both the BÃ b and BahÃ ` u 'll Ã h wrote various works in the form of a pentagram .