‘Then Daniel answered and said before the king, “Let your gifts be to yourself, and give your rewards to another. Nevertheless I will read the writing to the king, and make known to him its interpretation.”
Daniel politely states that he wishes for no reward. He is not here to benefit from what he is about to do. This probably impressed the king with the idea that such a man would speak only the truth. Besides such refusals were often seen as polite acceptances among orientals. But the reader is aware all the time that the promise is anyway an empty one, for by the morrow there will be no kingdom.