'Witnesses' in the Bible

I subscribed the deed, and sealed it, and called witnesses, and weighed him the money in the balances.

and I delivered the deed of the purchase to Baruch the son of Neriah, the son of Mahseiah, in the presence of Hanamel my uncle's son, and in the presence of the witnesses who subscribed the deed of the purchase, before all the Jews who sat in the court of the guard.

You have said to me, Lord Yahweh, Buy the field for money, and call witnesses; whereas the city is given into the hand of the Chaldeans.

Men shall buy fields for money, and subscribe the deeds, and seal them, and call witnesses, in the land of Benjamin, and in the places about Jerusalem, and in the cities of Judah, and in the cities of the hill country, and in the cities of the lowland, and in the cities of the South: for I will cause their captivity to return, says Yahweh.