Sayyidah Umm Salamah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), said that the Messenger of Allah (peace and blessings be upon him) said: "The first thing my Lord forbade me and took a covenant from me about, after the worship of idols and the drinking of wine, was quarrelling with people."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20807