Mukhtasar Bukhari

Narrated from Sayyiduna Urwah Al-Bariqi (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) gave him a dinar and told him to buy a goat. He went and bought two goats for one dinar, then sold one of them for one dinar, and brought one goat and one dinar to the Noble Prophet (peace and blessings of Allah be upon him). The Prophet (peace and blessings of Allah be upon him) prayed for blessings in his trade (and due to the blessing of the Prophet’s prayer, Urwah’s condition became such) that if he bought dust, he would also profit from it.