وَعَنْ عُرْوَةَ الْبَارِقِيِّ رضى الله عنه
«أَنَّ اَلنَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَعْطَاهُ دِينَارًا يَشْتَرِي بِهِ أُضْحِيَّةً، أَوْ شَاةً، فَاشْتَرَى شَاتَيْنِ، فَبَاعَ إِحْدَاهُمَا بِدِينَارٍ، فَأَتَاهُ بِشَاةٍ وَدِينَارٍ، فَدَعَا لَهُ بِالْبَرَكَةِ فِي بَيْعِهِ، فَكَانَ لَوْ اِشْتَرَى تُرَابًا لَرَبِحَ فِيهِ»
The Prophet (sallallahu alayhi wa sallam) gave him a Dinar to buy a sacrificial animal or a sheep. He bought two sheep with it, sold one of them for a Dinar and came back to him with a goat and a Dinar. So he invoked blessings on him in his business dealings, and he was such that if he had bought soil (of the earth) he would have made profit from it.
Bulugh al-Maram 937, Book 7, Business Transactions, Hadith 48. 1 min read