Sayyiduna al-Sa'ib bin Abi al-Sa'ib (may Allah be pleased with him) said that in the early days he had been a partner of the Prophet (peace and blessings be upon him) in trade. On the day of the Conquest of Makkah, he (peace and blessings be upon him) said: "Welcome (marhaban), my brother and my partner! You neither quarrelled nor disputed."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشركة / 11422