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YUSUFALI : But if they see a Sign, they turn away, and say, "This is (but) transient magic."

PICKTHAL : And if they behold a portent they turn away and say: Prolonged illusion.

SHAKIR : And if they see a miracle they turn aside and say: Transient magic.

M& HILALI : And if they see a sign, they turn away, and say: "This is continuous magic."