Sheikh Husayn al-Jabûrî, professor at Umm al-Qurâ University
A woman has to spend on her parents if she is affluent. The evidences for this are as follows:
1. Allah says: “Your Lord has decreed that you worship none but Him, and that you be kind to parents.” One aspect of this kindness is to spend money on them if they are in need.
2. Allah says: “Yet bear them company in this life with justice (and consideration).” It is part of this justice and consideration to spend on them even if they follow another religion.
3. The Prophet (peace be upon him) said: “The best of your food is that which you acquire from your own work, and your sons are from your own work, so eat what they give you with right good cheer.” Daughters, like sons, are from the work of their parents.
The Prophet (peace be upon him) answered the man who asked him: “Whom should I treat the best?” by saying: “Your mother, your mother, your mother, then your father, then the closest relatives.”
Source: Islam Today