Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai:4583 – Qutaybah > Abū al-Aḥwaṣ > Simāk > Ibn Jubayr > Ibn ʿUmar

"I used to sell gold for silver, or silver for gold. I came to the Messenger of Allah and told him about that, and he said: 'If you make a deal with your companion, d o not leave him when there is still any ambiguity (in the deal) between you."'  

النسائي:٤٥٨٣ – أَخْبَرَنَا قُتَيْبَةُ قَالَ حَدَّثَنَا أَبُو الأَحْوَصِ عَنْ سِمَاكٍ عَنِ ابْنِ جُبَيْرٍ عَنِ ابْنِ عُمَرَ قَالَ

كُنْتُ أَبِيعُ الذَّهَبَ بِالْفِضَّةِ أَوِ الْفِضَّةَ بِالذَّهَبِ فَأَتَيْتُ رَسُولَ اللَّهِ ﷺ فَأَخْبَرْتُهُ بِذَلِكَ فَقَالَ إِذَا بَايَعْتَ صَاحِبَكَ فَلاَ تُفَارِقْهُ وَبَيْنَكَ وَبَيْنَهُ لَبْسٌ  

See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:6131 – Qutaybah b. Saʿīd > Abū al-Aḥwaṣ > Simāk > Ibn Jubayr > Ibn ʿUmar

"I used to sell gold for silver, or silver for gold. I came to the Messenger of Allah and told him about that, and he said: 'If you make a deal with your companion, d o not leave him when there is still any ambiguity (in the deal) between you."' (Using translation from Nasāʾī 4583)  

الكبرى للنسائي:٦١٣١ – أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ قَالَ حَدَّثَنَا أَبُو الْأَحْوَصِ عَنْ سِمَاكٍ عَنِ ابْنِ جُبَيْرٍ عَنِ ابْنِ عُمَرَ قَالَ

كُنْتُ أَبِيعُ الذَّهَبَ بِالْفِضَّةِ وَالْفِضَّةَ بِالذَّهَبِ فَأَتَيْتُ رَسُولَ اللهِ ﷺ فَأَخْبَرْتُهُ بِذَلِكَ فَقَالَ «إِذَا بَايَعْتَ صَاحِبَكَ فَلَا تُفَارِقْهُ وَبَيْنَكَ وَبَيْنَهُ لَبْسٌ»