Genesis 15:7

I am the Lord. Between vs. 6 and 7 there must have been an interval of indeterminate length. The new revelation takes place during the day, apparently toward the end of the day (vs. 12 and 17), whereas the previous vision had taken place during the night (v. 5). This may have occurred the following day, or possibly later. The initial circumstances of the new revelation are not described.

To give thee this land. For the third time God assures Abram that he is to possess the entire land of Canaan (see chs. 12:7; 13:14, 15). But his status had not changed in the least since he first entered Canaan. At intervals God repeated the promise, and Abram accepted it without ever seeing a visible sign of its fulfillment. He was still the homeless wanderer he had been when he arrived from Mesopotamia, and was still childless. It is only natural that questions arose in his mind.