'Stack' in the Bible

Then Jacob told his relatives, "Go gather some stones." So they picked up stones and stacked them one on top of the other. Then they had a meal together there by the stack of stones.

Then Laban said, "This stack will serve as a witness between you and me today." That's how the place came to be named Galeed.

"Look!" Laban added, "Here is the stack of stones and here is the pillar that I've set up between you and me.

This stack is a witness, and so is this pillar, reminding me not to cross beyond this stack of stones, and reminding you not to pass by this stack in my direction, intending to cause harm.