The Prophet Muhammad (PBUH) went on shopping with Abu Hurairah. After trading, the Prophet gave silver pieces to the seller which was used instead of money to weigh and said:

“Be careful, and weigh heavily.” The amazed seller said that he had never heard such an offering from his customers before. Upon this, Abu Hurairah informed him that he was the prophet…Then the seller immediately wanted to kiss Prophet Muhammad’s hands (PBUH)… However, he did not allow him to do so.

“This is practiced by Persians for their kings. I’m not a king, but a person like you…”

On the way of returning home, Abu Hurairah wanted to help him by carrying his load. He did not allow him to do this, either.

“A person should carry his load only himself if possible.