"the miracle of Joshua the son of Nun"

 From the Old Testament Book of Joshua 10:12-13:

Then Joshua spoke to the Lord in the day when the Lord delivered up the Amorites before the sons of Israel, and he said in the sight of Israel, "O sun, stand still at Gibeon, And O moon in the valley of Aijalon."

So the sun stood still, and the moon stopped, Until the nation avenged themselves of their enemies. Is it not written in the book of Jashar? And the sun stopped in the middle of the sky and did not hasten to go down for about a whole day."

This passage is often ridiculed as plainly impossible, which is perhaps to miss the point of a miracle. Tolstoy seemed to have mixed feelings about the supernatural element of faith: on one hand, passages such as this show that he felt a purely scientific explanation for the world threatened to "destroy the conception of the soul", yet when he put together his own Bible, re-translated from Hebrew and Greek sources, he edited out all mentions of the supernatural until essentially all that was left was the Sermon on the Mount. Read Tolstoy's Bible online here.