Juwairiyah bin Qudamah says that the year in which Sayyiduna Umar (may Allah be pleased with him) was martyred, I was blessed with the opportunity to perform Hajj that year. I also visited Madinah Munawwarah, where Sayyiduna Umar (may Allah be pleased with him) delivered a sermon and said: "I saw in a dream that a red rooster pecked me once or twice." So, only one Friday had passed when he was attacked. Then the narrator mentioned the complete hadith, and that he (Umar) said: "I advise you to treat the dhimmis well, for they are under the responsibility of your Prophet (peace be upon him) (he has made a covenant with them). And regarding the villagers, he said: 'I advise you to treat the villagers well, for they are your brothers and the enemies of your enemies.'"
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 363