Genesis 21:30

And he said, For these seven ewe-lambs shalt thou take from my hand, that they may be a witness to me, that I have digged this well.

Genesis 31:52

This heap be witness, and this pillar be witness, that I will not pass over this heap to thee, and that thou shalt not pass over this heap and this pillar to me, for harm.

Genesis 31:44-48

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

But that it may be a witness between us, and you, and our generations after us, that we may 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, Ye have no part in the LORD.

Joshua 24:27

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