'Opened' in the Bible

The earth opened its mouth and swallowed them and their households, all Korah’s people, and all their possessions.

Then the Lord opened the donkey’s mouth, and she asked Balaam, “What have I done to you that you have beaten me these three times?”

Then the Lord opened Balaam’s eyes, and he saw the Angel of the Lord standing in the path with a drawn sword in His hand. Balaam knelt and bowed with his face to the ground.

and he proclaimed his poem:The oracle of Balaam son of Beor,the oracle of the man whose eyes are opened,

Then he proclaimed his poem:The oracle of Balaam son of Beor,the oracle of the man whose eyes are opened;

The earth opened its mouth and swallowed them with Korah, when his followers died and the fire consumed 250 men. They serve as a warning sign.