Nearly all commentators explain that Stephen's number of 75 people comes from the Septuagint (the Greek translation of the Old Testament), which was commonly used in his day. The Hebrew text of Genesis states 70. This is not seen as an error, but as Stephen quoting the version of Scripture most familiar to his audience. Some scholars, like John Gill, even offer ways to harmonize the numbers by including Jacob's sons' wives in the count of 'kindred'.