Adam Clarke on Matthew 27:7

To bury strangers in - Τοις ξενοις, the strangers, probably meaning, as some learned men conjecture, the Jewish strangers who might have come to Jerusalem, either to worship, or on some other business, and died there during their stay. See here, the very money for which the blessed Jesus was sold becomes subservient to the purpose of mercy and kindness! The bodies of strangers have a place of rest in the field purchased by the price at which his life was valued, and the souls of strangers and foreigners have a place of rest and refuge in his blood which was shed as a ransom price for the salvation of the whole world.