and I will make you swear by Hashem, the God of heaven and the God of the earth, that you will not take a wife for my son from the daughters of the Canaanites among whom I dwell,
English: Before Avraham came, the Holy One was King only over the heavens; once Avraham came, he made Him King over the heavens and over the earth, as it is said “I will make you swear by Hashem, the God of heaven and the God of the earth.”
On the daf / in context: Sifrei on Haazinu and parallel sources credit Avraham with expanding the recognition of God’s kingship from heaven alone to heaven and earth together.
Type of Learning
Custom (Sifrei — Avraham establishes God’s kingship on earth)
What Is Learned
Avraham is the one who proclaimed God’s sovereignty over both heaven and earth; the oath formula “God of heaven and God of the earth” records that achievement.