'Witnesses' in the Bible

At this, Boaz addressed the elders and all of the people: "You all are witnesses today that I hereby redeem everything from Naomi that belonged to Elimelech, including what belonged to Chilion and Mahlon,

along with Mahlon's wife Ruth the Moabite woman. I will marry her to continue the family name as an inheritance, so that the name of the deceased does not disappear from among his relatives, nor from the public record. You are all witnesses today!"

Then all of the assembled people, including the elders who were there, said, "We are witnesses! May the LORD make this woman who enters your house like Rachel and Leah, who together established the house of Israel. May you prosper in Ephrathah, and may you excel in Bethlehem!