[Machine] An Arab came to the Messenger of Allah ﷺ and said, "Give me your pledge of allegiance on Islam." So he gave him his pledge of allegiance on Islam. Then, on the next day, the Arab came while in a state of distress and said, "O Messenger of Allah, let me go." But he refused. Then, on the following day, the Arab came again while in a state of distress and said, "Let me go." But he refused. When he left, the Messenger of Allah ﷺ said, "The city (Medina) is like a furnace, it expels its impurities and keeps its good."
جَاءَ أَعْرَابِيٌّ إِلَى رَسُولِ اللهِ ﷺ فَقَالَ بَايِعْنِي عَلَى الْإِسْلَامِ فَبَايَعَهُ عَلَى الْإِسْلَامِ ثُمَّ جَاءَ مِنَ الْغَدِ مَحْمُومًا فَقَالَ يَا رَسُولَ اللهِ أَقِلْنِي فَأَبَى ثُمَّ جَاءَ مِنَ الْغَدِ مَحْمُومًا فَقَالَ أَقِلْنِي فَأَبَى فَلَمَّا وَلَّى قَالَ الْمَدِينَةُ كَالْكِيرِ تَنْفِي خَبَثَهَا وَيَنْصَعُ طَيِّبَهَا