[Machine] Al-Zubayr (may Allah be pleased with him) said, "I am your partner in the sale, and Ali and Uthman came to him and mentioned that to him. Uthman said, "How can I apply a condition upon a man in a sale where Al-Zubayr is his partner?" Ash-Shafi'i said, "Ali did not seek the condition except when he saw it, and Al-Zubayr, if the condition was invalid, would have said that it should not be applied to a mature free man. This is also the case for Uthman; in fact, all of them know the condition in the narration of your companion."  

الزُّبَيْرُ ؓ أَنَا شَرِيكُكَ فِي الْبَيْعِ وَأَتَى عَلِيٌّ عُثْمَانَ فَذَكَرَ ذَلِكَ لَهُ فَقَالَ عُثْمَانُ ؓ كَيْفَ أَحْجُرُ عَلَى رَجُلٍ فِي بَيْعٍ شَرِيكُهُ فِيهِ الزُّبَيْرُ؟ قَالَ الشَّافِعِيُّ فَعَلِيٌّ ؓ لَا يَطْلُبُ الْحَجْرَ إِلَّا وَهُوَ يَرَاهُ وَالزُّبَيْرُ ؓ لَوْ كَانَ الْحَجْرُ بَاطِلًا قَالَ لَا يُحْجَرُ عَلَى بَالِغٍ حُرٍّ وَكَذَلِكَ عُثْمَانُ بَلْ كُلُّهُمْ يَعْرِفُ الْحَجْرَ فِي حَدِيثِ صَاحِبِكَ