'Witness' in the Bible

He said, “You shall take these seven ewe lambs from my hand so that it may be a witness to me, that I dug this well.”

So now come, let us make a covenant, you and I, and let it be a witness between you and me.”

Laban said, “This heap is a witness between you and me this day.” Therefore it was named Galeed,

If you mistreat my daughters, or if you take wives besides my daughters, although no man is with us, see, God is witness between you and me.”

This heap is a witness, and the pillar is a witness, that I will not pass by this heap to you for harm, and you will not pass by this heap and this pillar to me, for harm.