Attended school, which was the last day of our course of lectures in Hebrew by Professor Seixas. ...
At evening I met with the Presidency in the Temple of the Lord. The Lord commanded us to tarry and san[c]tify our selves by washing our feet.
...Soon after this, the word of the Lord came to us through Pres[i]d[en]t J[oseph] Smith, Jun[ior], that those who had entered the Holy Place must not leave the House untill morning, but send for such things as were necessary, and also that during our stay we must cleans[e] our feet and partake of the sacrament that we might be made holy before Him, and thereby be qualified to officiate in our calling upon the morrow in washing the feet of the Elders.
Accordingly we proceeded and cleansed our faces and our feet, and then proceeded to wash each other's feet....
The Bishops and their councils were then washed, after which we partook of the bread and wine. The Holy S[p]irit rested down upon us and we continued in the Lord's House all night prophesying and giving glory to God.
[Faulring, Scott (ed.), An American Prophet's Record: The Diaries and Journals of Joseph Smith: Joseph Smith Diary, 1835-36, http://amzn.to/jsdiaries]