Phinehas Howe Richards records learning about ordinance of washing of feet in his journal.
Phinehas Richards, Journal, 22 January 1846–1 February 1846, [53], MS 1215, Church History Library
January 22d 1846. Visited the Temple with Wealthy she was sealed to me by the Prophet B. Young and then we repaired to the High Priests room where we were Anointed King and Queen. Priest and Priestess to the Most high God for Time and through out all Eternity by P.P. Pratt as mouth...
February 1st I labored in the Temple the last 8 working days Annointing in the High Priests Room. learnt the ordnance of the washing & anointing of feet for burial.