Genesis 46:26-27

26All those who went to Egypt with Jacob—those who were his direct descendants, not counting his sons’ wives—numbered sixty-six persons.

27With the two sons Hebrew; Septuagint the nine children who had been born to Joseph in Egypt, the members of Jacob’s family, which went to Egypt, were seventy Hebrew (see also Exodus 1:5 and note); Septuagint (see also Acts 7:14) seventy-five in all.