The original source for the phrase is in Exodus chapter 3:
And the Lord said, "I have surely seen the affliction of My people who are in Egypt, and I have heard their cry because of their slave drivers, for I know their pains. I have descended to rescue them from the hand[s] of the Egyptians and to bring them up from that land, to a good and spacious land, to a land flowing with milk and honey, to the place of the Canaanites, the Hittites, the Amorites, the Perizzites, the Hivvites, and the Jebusites. And now, behold, the cry of the children of Israel has come to Me, and I have also seen the oppression that the Egyptians are oppressing them. So now come, and I will send you to Pharaoh, and take My people, the children of Israel, out of Egypt."People who hate Israel are co-opting a promise made to the Children of Israel to inherit the land that the Arabs want exclusively for themselves.
(h/t Alyssa Kaplan)