The Doctrine and Covenants -Doctrine and Covenants – Chapter 20 | Verse 82

With a list of the names of the several members uniting themselves with the church since the last conference; or send by the hand of some priest; so that a regular list of all the names of the whole church may be kept in a book by one of the elders, whomsoever the other elders shall appoint from time to time;