It is narrated from Numeir bin Aws, he says that people (our elders) used to say: The ability to do good and to reform comes from Allah, and teaching manners is the responsibility of the parents.

Narrated from Sayyiduna Nu’man bin Bashir (may Allah be pleased with him) that my father took me to the Messenger of Allah (peace and blessings of Allah be upon him) and said: O Messenger of Allah! I make you a witness that I have given Nu’man such and such thing. The Messenger of Allah (peace and blessings of Allah be upon him) said:“Have you given to all your children?”He said: No. The Prophet (peace and blessings of Allah be upon him) said:“Then make someone else a witness besides me.”He also said:“Do you not like that all your children should behave equally well with you?”He said: Yes, of course. The Prophet (peace and blessings of Allah be upon him) said:“Then do not do this”(i.e., do not give to some and deprive the others).