Mark 12:31

31 The second most important command is this: “You should love other people as much as you love yourself.” No other commands are as important as these two.’

12:29Israel's people were the descendants of Jacob, who was also called Israel. Jacob's 12 sons became the ancestors of Israel's 12 tribes. The land that God gave to them as their home was called Israel.
12:31See Leviticus 19:18.