The Masoretes lived between the 8th and 10th centuries, and sought to establish a uniform version of the text that would be accepted, from that point onwards, in all Jewish communities.The Masora text was preserved with great accuracy and meticulousness by means of various devices.

In general, the Masora version of the text continues the version used by Chazal, nevertheless, it should be noted that in dozens of instances the Masora version differs from the text used by Chazal, and sometimes these differences are substantial. A clear awareness of the many discrepancies between the Masoretic version of Tanakh and the version used and cited by Chazal existed amongst authorities and commentators through the ages.

Courtesy of the Virtual Beit Midrash, Yeshivat Har Etzion