'Signed' in the Bible

Wherefore king Darius signed the writing and the interdict.

And when Daniel knew that the writing was signed, he went into his house (now his windows were open in his chamber toward Jerusalem) and he kneeled upon his knees three times a day, and prayed, and gave thanks before his God, as he did aforetime.

Then they came near, and spake before the king concerning the king's interdict: Hast thou not signed an interdict, that every man that shall make petition unto any god or man within thirty days, save unto thee, O king, shall be cast into the den of lions? The king answered and said, The thing is true, according to the law of the Medes and Persians, which altereth not.

Then answered they and said before the king, That Daniel, who is of the children of the captivity of Judah, regardeth not thee, O king, nor the interdict that thou hast signed, but maketh his petition three times a day.