Rachel was Laban’s daughter. Laban was the brother of Rebekah, Jacob’s mother. When Jacob saw Rachel, he went and moved the rock and gave water to the sheep.
There was a priest in Midian who had seven daughters. Those girls came to that well to get water for their father’s sheep. They were trying to fill the water trough with water.
But there were some shepherds there who chased the girls away and would not let them get water. So Moses helped the girls and gave water to their animals.