Who is more entitled to be treated with the best respect?

Narrated Abu Hurairah r.a:

A man came to Prophet ﷺ and said, "O Allah's Apostle! Who is more entitled to be treated with the best companionship by me?" The Prophet said, "Your mother."

The man said. "Who is next?"

The Prophet said, "Your mother."

The man further said, "Who is next?"

The Prophet said, "Your mother."

The man asked for the fourth time, "Who is next?"

The Prophet said, "Your father."

Sahih Bukhari [8:73:2]