Matthew 5:47 criticizes greeting only brothers — expanding Jesus’ instruction in Matthew 10 to greet all houses, even outsiders.

Luke 10:5 is the parallel passage instructing disciples to greet a house with 'Peace', directly matching Matthew 10:12.

Luke 10:6 continues the same teaching — the peace greeting rests on a worthy person, exactly as implied in Matthew 10:12.

In 1 Samuel 25:6, David greets Nabal with 'peace to your house' — the same blessing formula Jesus instructs disciples to use when entering a home.