2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
from Matthew Henry:
"not only for the past, or us present believers, but for the sins of all who shall hereafter believe on him or come to God through him. The extent and intent of the Mediator’s death reach to all tribes, nations, and countries. As he is the only, so he is the universal atonement and propitiation for all that are saved and brought home to God, and to his favour and forgiveness."