Say, "It was sent down by the One who knows the secrets in the heavens and the earth. He is always Forgiving, Compassionate."
Translation endnotes
[25:6] The answer contains a secret or a hidden word, an implication of the hidden code of the mathematical structure, which was unveiled in 1974, that is, 1406 lunar years after the revelation of the Quran. See 74:1-56.