One of my relatives sent me a large sum of money as a present on the occasion of my marriage. Should I accept it or be satisfied with the money I have?
There is no objection to you accepting such a present provided that one does not hanker after it. Moreover, the giver should be requited adequately when possible or be supplicated for. The Prophet (peace be upon him) said,
Requite him who does a favor to you, but if you are unable to requite him, go on praying for him till you are sure that you have requited him adequately.
Abu Dawud and
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.