'Sacred' in the Bible

When Belshazzar tasted the wine, he gave orders to bring the gold and silver vessels which Nebuchadnezzar his father had taken out of the temple which was in Jerusalem, so that the king and his nobles, his wives and his concubines might drink from them.

He will speak words against the Most High [God] and wear down the saints of the Most High, and he will intend to change the times and the law; and they will be given into his hand for a time, [two] times, and half a time [three and one-half years].

in the first year of his reign I, Daniel, came to understand from the sacred books that, according to the word of the LORD disclosed to the prophet Jeremiah, the years for the fulfilling of the desolation of Jerusalem were seventy in number.