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.
ibnmajah:2189ʿUthmān b. Abū Shaybah > Muḥammad b. al-Fuḍayl > Layth > ʿAṭāʾ > ʿAttāb b. Asīd

when the Messenger of Allah ﷺ sent him to Makkah, he forbade him from profiting off of what he did not possess.  

ابن ماجة:٢١٨٩حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا مُحَمَّدُ بْنُ الْفُضَيْلِ عَنْ لَيْثٍ عَنْ عَطَاءٍ عَنْ عَتَّابِ بْنِ أَسِيدٍ قَالَ

لَمَّا بَعَثَهُ رَسُولُ اللَّهِ ﷺ إِلَى مَكَّةَ نَهَاهُ عَنْ شِفِّ مَا لَمْ يُضْمَنْ