Charles Ellicott Commentary Joel 2:32

"And it shall come to pass, that whosoever shall call on the name of Jehovah shall be delivered; for in mount Zion and in Jerusalem there shall be those that escape, as Jehovah hath said, and among the remnant those whom Jehovah doth call." — Joel 2:32 (ASV)

Deliverance.— Or, perhaps better, those that escape. St. Paul quotes from this verse (Romans 10:13), transferring the reference to the Messianic advent, to prove the universality of the deliverance effected by our Lord, who abolished the difference between Jew and Greek. In His Church, the heavenly Jerusalem, freed from the persecutions and defilements of the world, there is salvation for all who call upon the name of the Lord, their names are inscribed upon the roll as citizens of Zion.