Muwatta Imam Malik Book of General Subjects, Hadith 16

Malik related to me from Abd ar-Rahman ibn Abd ar-Rahman ibn Sasaca from his father that Abu Said al-Khudri said that the Messenger of Allah ﷺ said, "It will soon happen that the best property of a muslim will be sheep which he takes to the peaks of the mountains and the valleys, fleeing with his deen from trials."

وَحَدَّثَنِي مَالِكٌ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَبْدِ اللَّهِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبِي صَعْصَعَةَ، عَنْ أَبِيهِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، أَنَّهُ قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " يُوشِكُ أَنْ يَكُونَ خَيْرُ مَالِ الْمُسْلِمِ غَنَمًا يَتْبَعُ بِهَا شَعَفَ الْجِبَالِ وَمَوَاقِعَ الْقَطْرِ يَفِرُّ بِدِينِهِ مِنَ الْفِتَنِ " .