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.
abudawud:3438Aḥmad b. ʿAmr b. al-Sarḥ > Sufyān > al-Zuhrī > Saʿīd b. al-Musayyab > Abū Hurayrah

The Prophet ﷺ forbade to bid against one another.  

أبو داود:٣٤٣٨حَدَّثَنَا أَحْمَدُ بْنُ عَمْرِو بْنِ السَّرْحِ حَدَّثَنَا سُفْيَانُ عَنِ الزُّهْرِيِّ عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ النَّبِيُّ ﷺ لاَ تَنَاجَشُوا  


See similar narrations below:

Collected by Ibn Mājah
ibnmajah:2174Hishām b. ʿAmmār And Sahl b. Abū Sahl > Sufyān > al-Zuhrī > Saʿīd > Abū Hurayrah

"Do not practice Najsh."  

ابن ماجة:٢١٧٤حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ وَسَهْلُ بْنُ أَبِي سَهْلٍ قَالاَ حَدَّثَنَا سُفْيَانُ عَنِ الزُّهْرِيِّ عَنْ سَعِيدٍ عَنْ أَبِي هُرَيْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ لاَ تَنَاجَشُوا