The Apparent Conflict Between the Hadith on Fleeing from the Leper and the Plague
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Question : It was reported from the Prophet (peace and blessings be upon him)
Answer : No, because this is more specific than the general ruling. One no longer mixes with the leper, whereas this [plague] is a reality in the country generally. It is not like this. Furthermore, leprosy may be more contagious than the plague. So the command of the Messenger (peace and blessings be upon him) to flee is not established.
His saying, “Flee from the leper as you would flee from a lion,” and its apparent conflict with this hadith.
قوله فر من المجذوم فراركم من الأسد وظاهر التعارض مع هذا الحديث.Answer : No, because this is more specific than the general ruling. One no longer mixes with the leper, whereas this [plague] is a reality in the country generally. It is not like this. Furthermore, leprosy may be more contagious than the plague. So the command of the Messenger (peace and blessings be upon him) to flee is not established.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 3648 - 4600 هل يتعارض حديث فر من المجذوم مع حديث النهي عن الخروج من البلد الذي وقع...؟ ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.