Ruling on Prioritizing Voluntary Fasting over Obedience to the Mother

Question:
A young woman wants to fast on Mondays and Thursdays, but her mother forbids her from fasting on the grounds that she is too young. What should she do? Should she obey her mother even though she is capable of fasting?

Answer:
Yes, yes. Voluntary fasting is recommended, and obedience to the mother is obligatory. The mother intends good, and her intention is to show mercy to her condition and not to burden herself. However, she should handle the matter with wisdom, kind words, and a good approach, so that her mother allows her to fast if the fasting does not burden her or affect her negatively.
The point is that this is from the mother out of affection and mercy, so the daughter should not disobey her, nor should there be discord between them. Instead, she should handle the matter with kind words and a good approach with her mother, so that she is pleased, if Allah wills, and so that she is able to fast without hardship.