Usama b. Zaid reported that Allah's Messenger (ﷺ) had said: Plague is the sign of a calamity with which Allah, the Exalted and Glorious, affects people from His servants. So when you hear about it, don't enter there (where it has broken out), and when it has broken out in a land and you are there, then don't run away from it.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، قَالاَ أَخْبَرَنَا الْمُغِيرَةُ، - وَنَسَبَهُ ابْنُ قَعْنَبٍ فَقَالَ ابْنُ عَبْدِ الرَّحْمَنِ الْقُرَشِيُّ - عَنْ أَبِي النَّضْرِ، عَنْ عَامِرِ بْنِ سَعْدِ، بْنِ أَبِي وَقَّاصٍ عَنْ أُسَامَةَ بْنِ زَيْدٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " الطَّاعُونُ آيَةُ الرِّجْزِ ابْتَلَى اللَّهُ عَزَّ وَجَلَّ بِهِ نَاسًا مِنْ عِبَادِهِ فَإِذَا سَمِعْتُمْ بِهِ فَلاَ تَدْخُلُوا عَلَيْهِ وَإِذَا وَقَعَ بِأَرْضٍ وَأَنْتُمْ بِهَا فَلاَ تَفِرُّوا مِنْهُ " . هَذَا حَدِيثُ الْقَعْنَبِيِّ وَقُتَيْبَةَ نَحْوَهُ .
sunnah.com