I'm not seeing an "if" here ...

[Gen 15:18-21 KJV] 18 In the same day the LORD made a covenant with Abram, saying, Unto thy seed have I given this LAND, from the RIVER of EGYPT unto the great river, the RIVER EUPHRATES:
19 The Kenites, and the Kenizzites, and the Kadmonites,
20 And the Hittites, and the Perizzites, and the Rephaims,
21 And the Amorites, and the Canaanites, and the Girgashites, and the Jebusites.