Young, Brigham.  “Ordinances that Can Only Be Administered in the Temple–Endowments, Etc.”  In Journal of Discourses 16:185-89.  Liverpool: Joseph F. Smith, 1884.  Reprint, Salt Lake City: Bookcraft, 1964. [Mormon/Ritual/Liturgy/Worship]

Brigham talks mainly about those ordinances which cannot be done unless inside a temple–sealings of children to parents, and endowments for the dead.  Contains a good quotation about being worthy of a temple recommend.  Children born in the covenant have the keys of the kingdom.