If He Married Another, What Should He Give the First
Question :
The following question was received by the Committee: A man has a wife and he marries another, then the first wife requests that he gives her jewelry like he gave the second. Is he required to give her or not?
Answer:
The Committee replied as follows: One who marries a woman is not obliged to give his first wife what he gave the second, such as the dowry or the jewelry which customarily is a part of the dowry. But if he gives her in order to appease her, out of kindness for her, then it is good. Especially if it is to his benefit to please her and to ensure her companionship with kindness in the future. And Allah is the Granter of success. And may peace and blessings be upon His servant and His Messenger, Muhammad and upon his family and Companions.
Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 5 Page 350