Daniel 9:23 does not use Dabar to speak of a written decree, or spoken decree, for God or for man. It does use it for word, command, etc. Scripture also uses the word the same for both God and man.
Note up front: KJV doesn't translate dabar H1697 as decree ever. In fact, some of the verses show that decree is a different word.
Hmmm... I'm surprised:
Daniel 9:23 At the beginning of thy supplications the
commandment H1697 came forth, and I am come to shew
thee; for thou
art greatly beloved: therefore understand the
matter,
H1697 and consider the vision.
Daniel 9:25 Know therefore and understand,
that from the going forth of the
commandment H1697 to restore and to build Jerusalem unto the Messiah the Prince
shall be seven weeks, and threescore and two weeks: the street shall be built again, and the wall, even in troublous times.
I think the question is why did they decide to translate the word differently in Daniel 9:25 in so many translations, next to Daniel 9:23. Perhaps to delineate between God and man? KJV didn't hold back here on doing a proper translation of either verse. So, yes, even Daniel used the word in relation to a human king. In this case it was either Cyrus, or Artaxerxes, if I recall. This is not the same as the last one, and I haven't actually looked into this one. The calculations place the last day on the day of the Triumphal Entry in 35 AD, I believe. That makes sense because it was at that time that the Jews "accepted" Jesus as King, and then unilaterally rejected Him. That causes the Messiah being cut off with nothing after sixty-nine weeks to make sense.
Below are multiple times that the same word refers to an earthly king's "commandment":
Esther 1:12 "But the queen Vashti refused to come at the king's
commandment H1697 by
his chamberlains: therefore was the king very wroth, and his anger burned in him."
Esther 1:19 "If it please the king, let there go a royal
commandment H1697 from him, and let it be written among the laws of the Persians and the Medes, that it be not altered, That Vashti come no more before king Ahasuerus; and let the king give her royal estate unto another that is better than she."
Esther 2:8 "So it came to pass, when the king's
commandment H1697 and his decree was heard, and when many maidens were gathered together unto Shushan the palace, to the custody of Hegai, that Esther was brought also unto the king's house, to the custody of Hegai, keeper of the women."
Esther 3:15 "The posts went out, being hastened by the king's
commandment, H1697 and
the decree was given in Shushan the palace. And the king and Haman sat down to drink; but the city Shushan was perplexed."
Esther 4:3 "And in every province, whithersoever the king's commandment
H1697 and his decree came,
there was great mourning among the Jews, and fasting, and weeping, and wailing; and many lay in sackcloth and ashes."
Esther 8:14 "
So the posts that rode upon mules
and camels went out, being hastened and pressed on by the king's
commandment.
H1697 And the decree was given at Shushan the palace."
Esther 8:17 "And in every province, and in every city, whithersoever the king's
commandment H1697 and his decree came, the Jews had joy and gladness, a feast and a good day. And many of the people of the land became Jews; for the fear of the Jews fell upon them."
Esther 9:1 "Now in the twelfth month, that
is, the month Adar, on the thirteenth day of the same, when the king's
commandment H1697 and his decree drew near to be put in execution, in the day that the enemies of the Jews hoped to have power over them, (though it was turned to the contrary, that the Jews had rule over them that hated them
"