Genesis 34:7

7Now when Jacob’s sons heard of it they came in from the field; they were deeply grieved, and they were very angry, for Shechem had done a disgraceful thing to 34:7 This use of the word “Israel” implies that the family of Israel (Jacob) was developing into a distinct people or nation. They are recognized by Pharaoh as a separate nation in Ex 1:9.Israel by lying with Jacob’s daughter, for such a thing is not to be done.