"Separation & Gathering"
Many of the early revelations to Joseph Smith were "bedrock" doctrines & principles that have been laid out in all dispensation. As in Section 27 & 28, Section 29, if you are looking for it, reveals to us the principles of creation, covenant, separation & gathering. It is given in the context of a "gathering", the General Conference. Also, the DBR & hierarchy are covered.

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Come Follow Me LDS
Doctrine and Covenants 29