says who?

Idioms  

1. Who claims the truth of this statement, which I don't believe? For example, That horse of your will never win a race.—Says who? This slangy expression of disagreement or disbelief may also be put in declarative form, says you!, meaning “I disagree with what you just said.” For example, It was an accident, I didn't mean to break it.—Says you! You've always hated that vase. [First half of 1900s]

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Example Sentences

High costs, limited production capacity, and supply-chain constraints are major barriers to universal access to the injections that can help people shift significant weight, says WHO.

From BBC

Too few people around the world can access them, says WHO.

From BBC

While folks behind the scenes said they didn’t want Stan Lee to be used as an advertising gimmick, its makers had asked it so many questions about Coca-Cola, it had changed its answer from a generic “I don’t deal with that kind of thing” to a thoughtful answer where, at the end, Lee says, “Who wouldn’t want to be in business with the company that been quenching thirsts for a hundred years?”

From Los Angeles Times

It boils down to a straight question, he says: "Who can put more assets into the water more quickly and readily?"

From BBC

In fact, it was her husband, she says, who encouraged her to “take time to enjoy life.”

From Los Angeles Times