Of whom have been

1. Acts 7: 52
     52 Which of the prophets have not your fathers persecuted? and they have slain them which shewed before of the coming of the Just One; of whom ye have been now the betrayers and murderers:
2. Alma 32: 4
     4 Now, as Alma was teaching and speaking unto the people upon the hill Onidah, there came a great multitude unto him, who were those of whom we have been speaking, of whom were poor in heart, because of their poverty as to the things of the world.
3. Ether 13: 1
     1 And now I, Moroni, proceed to finish my record concerning the destruction of the people of whom I have been writing.