Genesis 21:30

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

Genesis 31:52

May this heap be a witness, and the pillar be a witness, that I will not pass over this heap to you, and that you will not pass over this heap and this pillar to me, for harm.

Genesis 31:44-48

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

Joshua 22:27-28

but it will be a witness between us and you, and between our generations after us, that we may perform the service of Yahweh before him with our burnt offerings, with our sacrifices, and with our peace offerings;' that your children may not tell our children in time to come, 'You have no portion in Yahweh.'

Joshua 24:27

Joshua said to all the people, "Behold, this stone shall be a witness against us; for it has heard all the words of Yahweh which he spoke to us. It shall be therefore a witness against you, lest you deny your God."

Treasury of Scripture Knowledge

Summary

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

Bible References

A witness

Genesis 31:44
Now come, let us make a covenant, you and I; and let it be for a witness between me and you."
Joshua 22:27
but it will be a witness between us and you, and between our generations after us, that we may perform the service of Yahweh before him with our burnt offerings, with our sacrifices, and with our peace offerings;' that your children may not tell our children in time to come, 'You have no portion in Yahweh.'
Joshua 24:27
Joshua said to all the people, "Behold, this stone shall be a witness against us; for it has heard all the words of Yahweh which he spoke to us. It shall be therefore a witness against you, lest you deny your God."