Does anyone know where the term "keys" comes from when talking about the Priesthood? It looks like the biblical precedent is Matt 16:19, which talks about keys of the kingdom of heaven. The earliest reference to this I can find in modern scripture is April 1829 when the keys of the gift of translation are referred to (D&C 6:29) I seem to remember somebody on this site saying Parley Pratt used the term and it was adopted by Joseph, but I don't recall any documentation around it.