Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:18372Yaḥyá > Qays b. al-Rabīʿ > a man from Banī Asad from his father

[Machine] Hudhayfah purified the land of Kisra and the land of the family of Kisra, and whoever was of Kisra, he purified his land and the land of those who were killed and those who fled, and also the lands of foreigners and the stinking water.  

البيهقي:١٨٣٧٢حَدَّثَنَا يَحْيَى ثنا قَيْسُ بْنُ الرَّبِيعِ عَنْ رَجُلٍ مِنْ بَنِي أَسَدٍ عَنْ أَبِيهِ قَالَ

أَصْفَى حُذَيْفَةُ أَرْضَ كِسْرَى وَأَرْضَ آلِ كِسْرَى وَمَنْ كَانَ كِسْرَى أَصْفَى أَرْضَهُ وَأَرْضَ مَنْ قُتِلَ وَمَنْ هَرَبَ وَالْآجَامَ وَمَغِيضَ الْمَاءِ