Lu'lu' wal-Marjan

The meaning is that there is no need for an apology because my habit is that I become angry only for the sake of Allah. Otherwise, consider that due to your weeping, you have lost a great reward, and you did not observe patience at the sudden onset of the calamity. That is, the Messenger of Allah (peace be upon him) forgave the outburst and mistake that came from her chest in the state of distress, because she had no knowledge of it. And he clarified for her that true patience is that which is observed at the very beginning of the calamity, through which reward is attained. (Murattib)