Revelation, circa August 1830 [D&C 27]

Wherefore marvel not for the hour cometh that I will  drink of the fruit of the Vine with you on the Earth &  with you all those whom my father hath given me out of  the world Wherefore lift up your hearts & rejoice & Gird  up your loins & be faitful faithful untill I come  even so amen [p. 36]
Several times during summer 1830, JS attempted to confirm recently baptized church members at Colesville (now Nineveh), New York, without success. In August, Newel and Sally Knight traveled from Colesville to visit JS and Emma Smith in Harmony (now Oakland), Pennsylvania. JS decided to perform their confirmation and partake of the Lord’s Supper at the same time. When he set out to obtain wine for the sacrament service, he reported an encounter with a heavenly messenger that resulted in this revelation.
John Whitmer copied this text into Revelation Book 1 as “28th Commandment AD 1830” sometime between March and June 1831. It is addressed to the church with the explanation that it was given to “Joseph the Seer” by an angel.
The 1833 Book of Commandments assigns a date of “September 4, 1830,” as does the 1835 Doctrine and Covenants. Other period documents, however, offer circumstantial evidence supporting an August 1830 dating.