"Nehemia Gordon

Psalms 68:27 in the Aleppo Codex (right) and the Leningrad Codex (left). A scribal error in the Leningrad resulted in the name YHVH being written instead of Adonai. The scribes who preserved the Hebrew text of Scripture had a master list of 134 places that the word Adonai is supposed to appear by itself without the name YHVH, precisely to prevent this type of error from happening. The scribe who copied the Leningrad transcribed the other 133 verses in accordance with the list but accidentally wrote YHVH in this verse. The total number of instances of the Tetragrammaton in the Hebrew Bible is usually cited as 6,828 based on a digitized text of the Leningrad Codex. Because of this error, the true number should be revised to 6,827.
— with Yehovah."