(6) باب تَحْرِيمِ الْخِطْبَةِ عَلَى خِطْبَةِ أَخِيهِ حَتَّى يَأْذَنَ أَوْ يَتْرُكَ
Abu Huraira (Allah be pleased with him) reported Allah's Apostle (ﷺ) as having forbidden a dweller of the town selling the merchandise of a villager or outbidding in a sale (in order that another might fall into a snare), or a person making the proposal of marriage when his brother has already made such a proposal, or entering into a transaction when his brother has already entered; and a woman asking the divorce of her sister in order to deprive her of what belongs to her. 'Amr made this addition:
" The person should not purchase in opposition to his brother." (IT)
Reference (IT): Sahih Muslim 1413 a (IT)
In-book reference (IT): Book 16, Hadith 61 (IT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 8, Hadith 3289 (IT)