145 years ago today - Jan 13, 1877

[Special Instructions to Bishops]

Before the brethren or sisters go into the Temple to receive their endowments; they must wash themselves all over, perfectly clean, so as to enter the Temple clean. Men and women should have no sexual intercourse for a week or more previous to their going into the Temple to receive their endowments.

[Brigham Young, John W. Young, Wilford Woodruff, Erastus Snow, and Brigham Young Jr., "Special Instructions to Bishops", January 13, 1877, in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]