Abram was now without an heir. However, Yahweh appeared to him at this crucial time ( Genesis 13:14) and reconfirmed the promise of land that, He said, He would give to Abram"s offspring ( Genesis 13:15). [source][source][source]
Abram "lifted up his eyes" also ( Genesis 13:14), but he saw the whole land as far as he could see in every direction. God repeated His promise to give him and his descendants all the land he saw. This promise was more specific than God"s previous promises regarding the seed and the land ( Genesis 12:2; Genesis 12:7). This was God"s third revelation to Abram. It contained three specifics. [source][source][source]
1.Abram"s heir would be his own seed (offspring; Genesis 13:15-16).2.God would give the land to Abram and his descendants forever ( Genesis 13:15).3.Abram"s descendants would be innumerable ( Genesis 13:16). [source][source][source]
The figure of "dust" suggests physical seed ( Genesis 13:16; cf. Genesis 2:7). The "stars" figure given later ( Genesis 15:5) suggests heavenly or spiritual seed, in addition to physical seed. [source][source][source]
God"s encouragement to walk through the land ( Genesis 13:17) implied that Abram should claim the promise by treading the land under his feet. In the ancient Near East victorious armies claimed defeated territory by marching through it. [source][source][source]
"The divine promise of land and other blessings ( Genesis 12:1-3; Genesis 15:18-21; Genesis 17:1-8) is in the form of a covenant known technically in ancient Near Eastern studies as a "covenant of grant." It was made at the initiative of the granter and often with no preconditions or qualifications." [1][source]