Genesis 21:30

And he said, For these seven ewe lambs shall you take of my hand, that they may be a witness unto me, that I have dug this well.

Genesis 31:52

This heap be witness, and this pillar be witness, that I will not pass over this heap to you, and that you shall not pass over this heap and this pillar unto me, for harm.

Genesis 31:44-48

Now therefore come, let us make a covenant, I and you; and let it be for a witness between me and you.

But that it may be a witness between us and you, and our generations after us, that we might do the service of the LORD before him with our burnt offerings, and with our sacrifices, and with our peace offerings; that your children may not say to our children in time to come, you have no part in the LORD.

Joshua 24:27

And Joshua said unto all the people, Behold, this stone shall be a witness unto us; for it has heard all the words of the LORD which he spoke unto us: it shall be therefore a witness unto you, lest you deny your God.