The meeting at the well
After Jacob left Beersheba for Haran, he came to a well where shepherds gathered. Rachel came with her father’s sheep, and Jacob rolled the stone from the well’s mouth, watered the flock, kissed Rachel, and lifted up his voice and wept. He told her that he was Rebekah’s son, and she ran to tell Laban.
This is Jacob’s first recorded meeting with Rachel. He soon began the seven years of service for her hand in marriage.
How the age is estimated
Joseph’s birth at the end of fourteen years of service places Jacob near 91 at that time. Fourteen years earlier, when he arrived and met Rachel, he would have been about 77. The estimate depends on the same anchors used for the rest of the Jacob chronology: Jacob 130 in Egypt and Joseph about 39 at that arrival.
Scripture does not say “Jacob was seventy-seven when he met Rachel.” The figure is chronological reconstruction, not a single-verse age formula.