Mishkat al-Masabih #2809

Zuhra b. Ma'bad said his grandfather 'Abdallah b. Hisham would take him out to the market and buy grain, and Ibn ‘Umar and Ibn az- Zubair would meet him and say to him, “Take us into partnership, for the Prophet has invoked a blessing on you then he would take them into partnership. He would often make a profit of a camel-load* and send it to the house. ‘Abdallah b. Hisham had been taken by his mother to the Prophet who passed his hand over his head and invoked a blessing on him. Bukhari transmitted it. * Another explanation is that this means he made enough profit to buy a camel with its load' Cf. Mirqat, iii, 344.