Esther 5:9 - Clarke's commentary and critical notes on the Bible

Then went Haman forth that day joyful and with a glad heart: but when Haman saw Mordecai in the king's gate, that he stood not up, nor moved for him, he was full of indignation against Mordecai. That he stood not up, nor moved for him - This was certainly carrying his integrity or inflexibility to the highest pitch. But still we are left to conjecture that some reverence was required, which Mordecai could not conscientiously pay.