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
bukhari:2139 – Ismāʿīl > Mālik > Nāfiʿ > ʿAbdullāh b. ʿUmar

Messenger of Allah ﷺ said, "Do not urge somebody to return what he has already bought (i.e. in optional sale) from another seller so as to sell him your own goods."  

البخاري:٢١٣٩ – حَدَّثَنَا إِسْمَاعِيلُ قَالَ حَدَّثَنِي مَالِكٌ عَنْ نَافِعٍ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ؓ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَبِيعُ بَعْضُكُمْ عَلَى بَيْعِ أَخِيهِ  

See similar narrations below:

Collected by Muslim, Nasāʾī, Ibn Mājah, Mālik, Ibn Ḥibbān, Nasāʾī's Kubrá, Suyūṭī
muslim:1412e – Yaḥyá b. Yaḥyá > Mālik > Nāfiʿ > Ibn ʿUmar

One amongst you should not enter into a transaction when another is bargaining.  

مسلم:١٤١٢e – حَدَّثَنَا يَحْيَى بْنُ يَحْيَى قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَبِعْ بَعْضُكُمْ عَلَى بَيْعِ بَعْضٍ  

nasai:4503 – Qutaybah b. Saʿīd > Mālik And al-Layth > Nāfiʿ > Ibn ʿUmar

"No one of you should urge someone to cancel a sale he has already agreed upon with his brother so as to sell him his own goods."  

النسائي:٤٥٠٣ – أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ وَاللَّيْثِ وَاللَّفْظُ لَهُ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ لاَ يَبِيعُ أَحَدُكُمْ عَلَى بَيْعِ أَخِيهِ  

ibnmajah:2171 – Sūwayd b. Saʿīd > Mālik b. Anas > Nāfiʿ > Ibn ʿUmar

"Let one of you not undersell another."[1]  

ابن ماجة:٢١٧١ – حَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَبِيعُ بَعْضُكُمْ عَلَى بَيْعِ بَعْضٍ  

malik:31-97 – Yaḥyá > Mālik > Nāfiʿ > ʿAbdullāh b. ʿUmar

Yahya related to me from Malik from Nafi from Abdullah ibn Umar that the Messenger of Allah ﷺ said, "Do not let any of you bid against each other."  

مالك:٣١-٩٧ – حَدَّثَنِي يَحْيَى عَنْ مَالِكٍ عَنْ نَافِعٍ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَبِعْ بَعْضُكُمْ عَلَى بَيْعِ بَعْضٍ  

ذِكْرُ الزَّجْرِ عَنْ بَيْعِ الْمَرْءِ عَلَى بَيْعِ أَخِيهِ قَبْلَ أَنْ يَتَفَرَّقَ الْبَائِعُ وَالْمُشْتَرِي

ibnhibban:4965 – al-Ḥusayn b. Idrīs al-Anṣārī > Aḥmad b. Abū Bakr > Mālik > Nāfiʿ > Ibn ʿUmar

"Let one of you not undersell another."[1] (Using translation from Ibn Mājah 2171)  

ابن حبّان:٤٩٦٥ – أَخْبَرَنَا الْحُسَيْنُ بْنُ إِدْرِيسَ الْأَنْصَارِيُّ قَالَ أَخْبَرَنَا أَحْمَدُ بْنُ أَبِي بَكْرٍ عَنْ مَالِكٍ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «لَا يَبِعْ بَعْضُكُمْ عَلَى بَيْعِ بَعْضٍ»  

ذِكْرُ الْبَيَانِ بِأَنَّ هَذَا الْفِعْلَ إِنَّمَا زُجِرَ عَنْهُ مَا لَمْ يَأْذَنِ الْبَائِعُ الْأَوَّلُ فِيهِ

ibnhibban:4966 – al-Ḥasan b. Sufyān > Muḥammad b. ʿAbdullāh b. Numayr from my father > ʿUbaydullāh b. ʿUmar > Nāfiʿ > Ibn ʿUmar

[Machine] The Messenger of Allah ﷺ said, "None of you should sell the property of his brother without his permission."  

ابن حبّان:٤٩٦٦ – أَخْبَرَنَا الْحَسَنُ بْنُ سُفْيَانَ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ قَالَ حَدَّثَنَا أَبِي قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عُمَرَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «لَا يَبِعْ أَحَدُكُمْ عَلَى بَيْعِ أَخِيهِ إِلَّا بِإِذْنِهِ»  

nasai-kubra:6050 – Qutaybah b. Saʿīd > Mālik And al-Layth > Nāfiʿ > Ibn ʿUmar

Messenger of Allah ﷺ said, "Do not urge somebody to return what he has already bought (i.e. in optional sale) from another seller so as to sell him your own goods." (Using translation from Bukhārī 2139)   

الكبرى للنسائي:٦٠٥٠ – أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ وَاللَّيْثِ وَاللَّفْظُ لَهُ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

عَنِ النَّبِيِّ ﷺ قَالَ «لَا يَبِيعُ أَحَدُكُمْ عَلَى بَيْعِ بَعْضٍ»