Daughters responsibilities to parents

Assalamu Alaikum Sisters,

I would like to know more about an adult daughter's responsibility toward her parents.  Are there references in the Quran and Sunnah regarding a daughter's financial obligation toward her parents?  Is she obligated to contribute money to support her mother who is in need (especially in the case where the son's financial contribution is not enough by itself)? 

The reason I ask is because I am seeing a situation where a mother is no longer being supported by her husband and yet her college-educated daughters are not making an effort to assist her financially.  They are putting the entire burden on their brother, who is contributing what he can, but it is not enough.  What should be done in this case? 

Thank you for your assistance

Salam

any other views on this topic? do all children have a duty to support thier parents in old age, or is it according to ones means? is it a choice, or an obligation?

some children take it upon themselves to support their unemployed parents. they dont wait for thier parents to ask them for help. they just do the necessary as they deem fit. while other children wont even bother and thier parents have to beg them to get a penny out of them.

personally, i am greatful for all the things my folks did to raise me. i know i can never repay them. but they raised me to realise that i now have a duty towards them in thier old age. i wont eat in my own home, not knowing if they are going hungry. i make sure that with my limited means, i provide for them whatever i can. and i dont do it out of a sense of duty. i do it cos it feels good to know that i can now do stuff for my parents who supported me through school and university. the look of appreciation and pride i see in their eyes, is priceless.

my advise to any child is do whatever u can for your folks. dont wait for your other siblings or compare yourself to your other siblings and demand that they too must contribute. if u have the means, support your folks, and do it sincerely. what greater pleasure can there be, than to earn your parents and thus earn Allah swts favour.