[First Presidency Office Journal]
[At a meeting concerning testimony regarding the nature of the oaths of the endowment:] The question of testifying to any of the Endowments or instructions was considered, by some it was 519 thought that the instructions given about praying to the Lord to avenge the blood of the Prophets and referring to the 6th Chapter of revelations 9 & 10th verses as what is prayed for and taught so as to refute the testimony which has been given. would be proper. others thought that it should not be mentioned as fully as it is given &c.
[First Presidency Office Journal, as quoted in Minutes of the Apostles of The Church of Jesus Christ of Latter-day Saints, 1910-1951, Privately Published, Salt Lake City, Utah 2010]