Genesis 29:2-3

29:2 He saw in the field a well with three flocks of sheep lying beside it, because the flocks were watered from that well. Now a large stone covered the mouth of the well. 29:3 When all the flocks were gathered there, the shepherds would roll the stone off the mouth of the well and water the sheep. Then they would put the stone back in its place over the well’s mouth.