Masoret

The Masorets, by their great care and diligence, have left us an edition of the Old Testament, which secures the text from all interpolations, while it checks also the licentiousness of conjectural criticism, and gives a definite meaning to many obscure passages; at the same time, it by no means precludes the labours of the learned from aiming at greater accuracy in their attempts to understand Scripture, as the sense which the Masorets may have put upon any passage can only be said to be highly probable: the meaning of Scripture in all cases being derivable from the words, and not from the vowel points, or any arbitrary divisions.

...the transcribers themselves have candidly intimated by the suspended Nun that סשמ is the genuine reading, and the Masorets also expressly state, that the Nun was inserted, in order that the first idolatrous priest should not be said to be a grandson of Moses.