عَنْ حَكِيمِ بْنِ حِزَامٍ رَضِيَ اللَّهُ عَنْهُ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي أَشْتَرِي بُيُوعًا فَمَا يَحِلُّ لِي مِنْهَا وَمَا يَحْرُمُ عَلَيَّ قَالَ فَإِذَا اشْتَرَيْتَ بَيْعًا فَلَا تَبِعْهُ حَتَّى تَقْبِضَهُ
Narrated by Sayyiduna Hakim bin Hizam (may Allah be pleased with him), he says: I said, "O Messenger of Allah! When I buy some things, which of them are lawful for me and which are unlawful?" The Prophet (peace and blessings be upon him) said: "When you buy something, do not sell it further until you have taken possession of it."