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An adaptation of a commandment of Jesus in the Sermon on the Mount: “Whosoever shall compel thee to go a mile, go with him twain” (two).
Note: Figuratively, to do more than what is needed.
To make an extra effort; do more than usual: It is time to communicate that. It is time to go that extra mile/ But for women, you have to go the extra mile to prove your credibility (1980s+)