It was narrated from 'Ata that 'Attab bin Asid said that :
when the Messenger of Allah ﷺ sent him to Makkah, he forbade him from profiting off of what he did not possess.

حَدَّثَنَا 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 .