The fact that the king durst not send for Ammon worked out to Ammon’s advantage. The record says:
“And it came to pass that when Ammon had made ready the horses and the chariots for the king and his servants, he went in unto the king, and he saw that the countenance of the king was changed; therefore he was about to return out of his presence. And one of the king’s servants said unto him, Rabbanah, which is, being interpreted, powerful or great king, considering their kings to be powerful; and thus he said unto him: Rabbanah, the king desireth thee to stay. Therefore Ammon turned himself unto the king, and said unto him: What wilt thou that I should do for thee, O king? And the king answered him not for the space of an hour, according to their time, for he knew not what he should say unto him. And it came to pass that Ammon said unto him again: What desirest thou of me? But the king answered him not. And it came to pass that Ammon, being filled with the Spirit of God, therefore he perceived the thoughts of the king. And he said unto him: Is it because thou hast heard that I defended thy servants and thy flocks, and slew seven of their brethren with the sling and with the sword, and smote off the arms of others, in order to defend thy flocks and thy servants; behold, is it this that causeth thy marvelings?”