One of the promised blessings of the Abrahamic Covenant was a nation or seed. Thus, one can conclude that Abraham would have a child as part of the promise. This also applies to the theocratic administration of the Kingdom program. If the administration were to continue, there needed to be a new administrator. This would be Abraham’s seed or heir. So, God gave Abraham a son named Isaac (Gen. 21:2-3) and reaffirmed the covenant (26:3-5) and continued the administration. Isaac then had Jacob (Gen. 25:21-26), who was the heir of administration, and prophesied the fulfillment of the covenant through a king rising from the tribe of Judah (Gen. 49:8-10).