'Word of the Lord' in the Bible

Now in the first year of Cyrus king of Persia, that the word of the LORD by the mouth of Jeremiah might be fulfilled, the LORD stirred up the spirit of Cyrus king of Persia, that he made a proclamation throughout all his kingdom, and put it also in writing, saying,

And there resorted unto me all such as feared the word of the LORD God of Israel, because of the great transgression. And I sat mourning until the evening sacrifice.