and when all the flocks were gathered there, the shepherds would roll the stone from the mouth of the well and water the sheep, and put the stone back in its place over the mouth of the well.
Genesis 29:3 ESV

This limitation on the use of the well seems unusual. It indicates either distrust or an assertion of control.

If the former, then there was probably a limited amount of water available, so the stone ensured one flock wouldn't take all the water when the others or away. If the latter, then someone just wanted to maintain control over vital resources.

This is like religious leaders (Pharisees, priests, pastors, etc.) who hide God’s Word and Spirit from the people in order to monopolize and twist the truth.