The Samaritan Pentateuch reads, "Now the sojourning of the
   children of Israel, and of their fathers in the land of
   Canaan and in the land of Egypt, was 430; years."  The
   Alexandrine copy of the LXX. has the same reading; and the
   same statement is made by the apostle Paul, in Ga 3:17, who
   reckons from the promise made to Abraham to the giving of the
   law.  That these three witnesses have the truth, the
   chronology itself proves; for it is evident that the
   descendants of Israel did not dwell 430; years in Egypt; while
   it is equally evident, that the period from Abraham's entry
   into Canaan to the Exodus, is exactly that number.  Thus,
   from Abraham's entrance into the promised land to the birth
   of Isaac, was 25; years; Isaac was 60; at the birth of Jacob;
   Jacob was 130; at his going into Egypt; where he and his
   children continued 215; years more; making in the whole 430
   years.  See Kennicott's Dissertation on the Hebrew Text.

 * sojourning.
  Ac 13:17  Heb 11:9 
 * four hundred.
  Ge 12:1-3  15:13  Ac 7:6  Ga 3:16,17