Is it lawful to delay Mahr or part of it with the wife's approval?

Q 2: I owe my wife 5,000 Ryials from her Mahr (mandatory gift to a bride from her groom). I bought her gold with 1,500 Riyals and delayed the rest of the money. She accepted to delay the rest of the debt. Am I committing a sin this way?

A: If the reality is as mentioned; that she accepts that you postpone the rest of her Mahr which you owe her, there is no harm on you. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.