وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " لَا يَبِعْ أَحَدُكُمْ عَلَى بَيْعِ أَخِيهِ ، وَلَا يَخْطُبْ أَحَدُكُمْ عَلَى خِطْبَةِ أَخِيهِ " .
And the Noble Prophet (peace and blessings be upon him) said: None of you should sell over the sale of his brother, and no man should send a marriage proposal over the proposal of his brother.