This hadith has been reported on the authority of al-A'mash with the same chain of transmitters, and the words are that the servant should not say to his chief: My Lord, and Abu Mu'awiya made an addition:" For it is Allah, the Exalted and Glorious, Who is your Lord".
The Prophet Muhammad ﷺ taught us through this hadith that we should never forget who our real master is - it is only Allah who deserves our worship, love, obedience, and loyalty. He also reminded us of the importance of respecting those around us regardless of their position or rank in society; we should never forget that everyone has been created by God with equal worth and dignity.