Sayyiduna Abu Dharr (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "You will conquer a land in which the qirat is mentioned. Accept the counsel to treat its people well, for they have a covenant of protection and ties of kinship. And when you see two men quarrelling over the space of a single brick, leave from there." He says: Rabi'ah and Abd al-Rahman, the sons of Shurahbil bin Hasanah (may Allah be pleased with them both), were quarrelling over a space the size of a brick, so he left from there.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18739