“And the LORD visited Sarah as He had said, and the LORD did unto Sarah as He had spoken.
For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.” Genesis 21:1-2 (KJB)
REFERENCES: Genesis 50:24; Luke 1:68; 19:44; Romans 4:17-20; Matthew 24:35; Galatians 4:23, 28; Titus 1:2