عَنْ عَبْدِ الرَّحْمَنِ بْنِ شِمَاسَةَ التُّجِيبِيِّ قَالَ سَمِعْتُ عُقْبَةَ بْنَ عَامِرٍ الْجُهَنِيَّ رَضِيَ اللَّهُ عَنْهُ يَقُولُ وَهُوَ عَلَى مِنْبَرِ مِصْرَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ لَا يَحِلُّ لِامْرِئٍ يَبِيعُ عَلَى بَيْعِ أَخِيهِ حَتَّى يَذَرَهُ
Abdur Rahman bin Shumasa says: I heard Sayyiduna Uqbah bin Amir (may Allah be pleased with him) saying from the pulpit in Egypt that the Messenger of Allah (peace and blessings be upon him) said: It is not lawful for a man to trade over his brother’s trade, unless he leaves it.