Three visitors come to Abraham's tent, and the LORD promises that Sarah will have a son. Sarah laughs within herself, and the LORD asks, “Is anything too hard for the LORD?” That question still echoes over every impossible situation.
Abraham intercedes for Sodom, asking God to spare the city for the sake of the righteous. Two angels lead Lot and his family out before judgment falls. Lot's wife looks back from behind him, and she becomes a pillar of salt. Jesus later says, “Remember Lot's wife.”
The LORD visits Sarah as He had said, and she bears Abraham a son in his old age. Abraham is one hundred years old when Isaac is born, and Sarah says, “God has made me laugh.” The name Isaac means laughter. God turned her laughter of doubt into laughter of joy.
Then God tests Abraham: “Take now your son, your only son Isaac, whom you love.” On the mountain Isaac asks, “Where is the lamb?” Abraham answers, “God will provide for Himself the lamb.” The angel of the LORD stops Abraham's hand, and he sees a ram caught in a thicket by its horns. Abraham names the place The-LORD-Will-Provide (in Hebrew, Jehovah Jireh). Centuries later, God would not spare His own Son, Jesus, the Lamb of God.