Sunan At-Tirmidhi

Bahz bin Hakim narrated from his father, from his grandfather who said:""I said: 'O Messenger of Allah! Who most deserves(my) reverence?' He said: 'Your mother.'"" He said: ""I said: 'Then who?' He said: 'Your mother.'"" He said: ""I said: 'Then who?' He said: 'Your mother.'"" He said: ""I said: 'Then who?' He said: 'Then your father, then the nearest relatives, then the nearest relatives