The Prophet ﷺ gave him a dinar to buy a sacrificial animal or a sheep. He bought two sheep, sold one of them for a dinar, and brought him a sheep and dinar. So he invoked a blessing on him in his business dealing, and he was such that if had he bought dust he would have made a profit from it.  

أَعْطَاهُ النَّبِيُّ ﷺ دِينَارًا يَشْتَرِي بِهِ أُضْحِيَةً أَوْ شَاةً فَاشْتَرَى شَاتَيْنِ فَبَاعَ إِحْدَاهُمَا بِدِينَارٍ فَأَتَاهُ بِشَاةٍ وَدِينَارٍ فَدَعَا لَهُ بِالْبَرَكَةِ فِي بَيْعِهِ فَكَانَ لَوِ اشْتَرَى تُرَابًا لَرَبِحَ فِيهِ  

The tradition mentioned above has also been transmitted by 'Urwat al-Bariqi through a different chain of narrators. The wordings of this version are different from those of the previous one.  

حَدَّثَنِي عُرْوَةُ الْبَارِقِيُّ بِهَذَا الْخَبَرِ وَلَفْظُهُ مُخْتَلِفٌ  

The Messenger of Allah ﷺ sent with him a dinar to buy a sacrificial animal for him. He bought a sheep for a dinar, sold it for two and then returned and bought a sacrificial animal for a dinar for him and brought the (extra) dinar to the Prophet ﷺ. The Prophet ﷺ gave it as alms (sadaqah) and invoked blessing on him in his trading.  

أَنَّ رَسُولَ اللَّهِ ﷺ بَعَثَ مَعَهُ بِدِينَارٍ يَشْتَرِي لَهُ أُضْحِيَةً فَاشْتَرَاهَا بِدِينَارٍ وَبَاعَهَا بِدِينَارَيْنِ فَرَجَعَ فَاشْتَرَى لَهُ أُضْحِيَةً بِدِينَارٍ وَجَاءَ بِدِينَارٍ إِلَى النَّبِيِّ ﷺ فَتَصَدَّقَ بِهِ النَّبِيُّ ﷺ وَدَعَا لَهُ أَنْ يُبَارَكَ لَهُ فِي تِجَارَتِهِ