Genesis 29:2-3

2And he looked, and saw a well in the field; and behold, there were three flocks of sheep lying by it; for out of that well they watered the flocks. A large stone was on the well’s mouth.

3Now all the flocks would be gathered there; and they would roll the stone from the well’s mouth, water the sheep, and put the stone back in its place on the well’s mouth.