Is what was narrated about Khalid ibn al-Walid on the day of his dismissal true, that he said: "I do not fight for 'Umar, but rather I fight to please the Lord of 'Umar"?

The aforementioned statement attributed to Khalid ibn al-Walid has not been found in reliable sources, but its meaning is sound, for Khalid strove for the sake of Allah the Almighty, not to please anyone.